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56tracy

Guest

entering a function into graphing calculator

How do I enter the function Y^2=X into a TI 83 plus?  Thanks.

fahad

Member

Registered: 2010-06-02

Posts: 4

Re: entering a function into graphing calculator

hi,
are you trying to draw a graph ?

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KrazyKyngeKorny

Member

Registered: 2010-06-07

Posts: 12

Re: entering a function into graphing calculator

How do I enter the function Y^2=X into a TI 83 plus?  Thanks.

You don't. You enter
y=sqrt(x)

ALWAYS, you enter
y=(function)
the y= part is fixed. You can't change it. You have to manipulate the right side to make it equal y.

Last edited by KrazyKyngeKorny (2010-06-07 04:13:05)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,621

Re: entering a function into graphing calculator

The graph of Y^2=X should be a symmetrical parabola (like Y = X^2 but 'on its side'). 

If you use sqrt you'll only get half the graph because the calc will default to the positive root.  To get the whole graph plot two functions:

Y1=sqrt(x) and Y2=negative sqrt(x) [note : use the negative key not the subtract key]

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Children are not defined by school ...........The Fonz
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simron

Real Member

Registered: 2006-10-07

Posts: 237

Re: entering a function into graphing calculator

Bob bundy makes a good point. Another thing that I can do on my TI-84 Plus Silver Edition (Maybe it works on the TI-83, I don't know...) is to input y=±√x.
Another thing you could do is use the "Implicit Grapher" here on Maths Is Fun. You could input x=y² on it.

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Linux FTW

SatisticsFun

Member

Registered: 2014-11-24

Posts: 2

Re: entering a function into graphing calculator

Hey, if you are not a coder and do not like cryptic math input you should check out the following one:

https://www.plotgraphs.com/

It provides a graphical editor for the formula which is rather handsome. The graphs are also looking a bit nicer for my taste than with Wolfram Alpha....