Question

HELP


The change in water level of a lake is modeled by a polynomial function, W(x). Describe how to find the x-intercepts of W(x) and how to construct a rough graph of W(x) so that the Parks Department can predict when there will be no change in the water level. You may create a sample polynomial of degree 3 or higher to use in your explanations.

Answer 1

let y = 0, any function you want so long as it is cubed or higher...

Answer 2

My answer can be y=0?

Answer 3

so y intercepts are found by letting x = 0 and finding for y, and x intercepts are found by letting y =0 and finding for x.

Answer 4

so something like W(x) = ax3 + bx2 +cx +d would be fine. savvi?

Answer 5

okay thank you!