Question

If I graph the polynomial function y=-x^3+4x should the points I get be:
x| -3 | -2 | -1 | 0 | 1 | 2
y| 15 | 0 | -3 | 0 | 5 | 16
or am I wrong?

Answer 1

Did you plug them into the equation?

Answer 2

I did

Answer 3

hmm.. Could you show me how you did it so i can correct your mistake.

Answer 4

I used a graphing calculator and plugged in for x

Answer 5

Dont trust a graphing calculator because it only does what you tell it to do. It does not correct your mistakes. For (-3, 15). if you plug in your x's in real life u will notice that it equals -21

Answer 6

Ok, I shall do it on paper.