how do i do it to graph this in a calculator x= y^2 + 2y + 1

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- May 18th 2011, 08:51 PMhomerbgraphing
how do i do it to graph this in a calculator x= y^2 + 2y + 1

- May 18th 2011, 08:54 PMTKHunny
Don't laugh.

Graph this: y = x^2 + x + 1

Then turn your calculator 1/4 turn clockwise. :-) - May 18th 2011, 09:01 PMhomerb
it is funny, but there is not another way to do it? like solving for y

- May 18th 2011, 09:03 PMTKHunny
You can solve for y, but you may not be happy with the results. You should get TWO different pieces. It is not a "function", so it takes a bit more effort.

I'd just turn the calculator. Don't you think your classmates would get a hoot out of it? Maybe your teacher has a sense of humor? It demonstrates a knowledge of reflection across the line x = y. Don't you want to be the first on in your class to claim that knowledge? - May 18th 2011, 11:21 PMjgv115
Hahaha you were probably told to graph the inverse of $\displaystyle y =x^2 +x +1 $ as TKHunny said.

You can't take the inverse of a quadratic in polynomial form. You have to complete the square and put it into Turning Point form then swap x and y and solve for y. - May 19th 2011, 04:25 AMTKHunny
Okay, technically, you should grab your calculator by the upper right and lower left corners and flip it over, but in this case the 90º rotation is a good substitute.

- May 19th 2011, 05:43 AMmr fantastic