Math Is Fun Forum

rakhi

Member

Registered: 2012-06-14

Posts: 3

Grap Drawing

Draw  graph (1) y greater than equal to x
                   (2) y greater than less than x

Bob

Administrator

Registered: 2010-06-20

Posts: 10,583

Re: Grap Drawing

hi rakhi,

Did my previous post with the |x| graph help?

With > and < graphs, you will end up shading a whole region.

So find the boundary (boundaries) first

That means replacing the > sign with an equals.

So mark the line y = x.

Then decide which side of the line will make y > x

If you are unsure,  choose any point that is not on the line, say (5,3)

Is y > x for this point?  ie is 3 > 5.  No it isn't.  So this point isn't in the region.  I need y to be bigger.

So try (5,7).  Is y > x now? Yes it is. 7 > 5.  So this point is in the region.

Shade that side of the line.

If the boundary is to be included as well, make the boundary line solid.

If the boundary is not to be included, use a dotted line.

Hope that helps,

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob