Question

What is the y-intercept of the polynomial f(x) defined below? Write the y-

value only.
f(x) = -7x – 2x3

Answer 1

Y-intercept = 0 ( aka. (0,0) )

Explanation:

The y-intercept of a function is found when x=0:

f(x) = -7x - 2x³

f(0) = -7(0) - 2(0)³

f(0) = 0 - 0

f(0) = 0

Therefore, the y-intercept of the polynomial is 0. You can also say that it is 0 because a cubic function is symmetrical about the origin.