# Math Is Fun Forum

Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #51 2014-12-07 00:28:22

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

bobbym wrote:

How would you graph Shivam's example?

See you later, have a chore. Take a look around in the help in the meantime.

Something like :

``Plot[y = x^2 + x - 6, {x, 10, -10}]``

?

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## #52 2014-12-07 01:00:23

Agnishom
Real Member
From: Riemann Sphere
Registered: 2011-01-29
Posts: 24,989
Website

### Re: Teach David

Yep, that works!

Or even simpler:

``Plot[x^2 + x - 6, {x, 10, -10}]``

Last edited by Agnishom (2014-12-07 01:00:55)

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.

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## #53 2014-12-07 01:00:57

David
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From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Chris2 wrote:
bobbym wrote:

You can graph it easily:

Plot[3x - 9,{x,-10,10}]

What does this part means? {x,-10,10} x-min and x-max?

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #54 2014-12-07 02:57:24

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Hi;

Got it now?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #55 2014-12-07 02:57:59

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Hi;
Yes, bobbym

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #56 2014-12-07 03:00:13

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

What are you looking at now?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #57 2014-12-07 03:04:34

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

planing to have my eye shut. Night.

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #58 2014-12-07 03:05:42

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Hi;

Okay, see you later and sleep well.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #59 2014-12-08 02:18:59

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #60 2014-12-08 02:20:27

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Howdy;

Where are you in the help?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #61 2014-12-08 02:23:21

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Show me something interesting.

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #62 2014-12-08 02:24:34

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Let us do some Inequality plots!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #63 2014-12-08 02:24:59

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Okay.

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #64 2014-12-08 02:26:40

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

This will be hard since I have never graphed an inequality with m, so hold on.

Apparently, it is all done with the command RegionPlot.

Look at this one!

RegionPlot[x^2 + y^2 < 1, {x, -1, 1}, {y, -1, 1}, Mesh -> 10, MeshShading -> {{Automatic, None}, {None, Automatic}}, ColorFunction -> "DarkRainbow"]

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #65 2014-12-08 02:33:30

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Um... I Don't really understand. O.O the codes O.O...

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #66 2014-12-08 02:36:16

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Neither do I, that is a complicated one. I just want you to see it. It is amazing.

Just cut and paste

``RegionPlot[x^2 + y^2 < 1, {x, -1, 1}, {y, -1, 1}, Mesh -> 10, MeshShading -> {{Automatic, None}, {None, Automatic}}, ColorFunction -> "DarkRainbow"]``

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #67 2014-12-08 02:36:57

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

I typed it. M is so much fun and fascinating.

Last edited by David (2014-12-08 02:37:24)

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #68 2014-12-08 02:37:42

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

You must type faster than me. Okay, run it!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #69 2014-12-08 02:38:03

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

I did.

Last edited by David (2014-12-08 02:39:01)

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #70 2014-12-08 02:41:17

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

Look at that and all done with one command! Can you believe that is an inequality?

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #71 2014-12-08 02:42:06

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

NOPE! I can't.

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #72 2014-12-08 02:44:52

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

This one is a bit simpler but still way too much for my brain.

You can just copy and paste.

RegionPlot[x^2 + y^3 < 2, {x, -2, 2}, {y, -2, 2}]

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #73 2014-12-08 02:46:54

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

Interesting.

Last edited by David (2014-12-08 02:47:07)

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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## #74 2014-12-08 02:49:21

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Teach David

The blue part is all the points that satisfy that inequality.

We will try one on our own.

Graph the inequality x + y < 10

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #75 2014-12-08 02:52:15

David
Member
From: Bumpkinland
Registered: 2014-04-23
Posts: 3,164

### Re: Teach David

I got this :

His dominion is an everlasting dominion, Which shall not pass away, And His kingdom the one Which shall not be destroyed.

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