Question

What is the y-intercept of the quadratic function f(x) = (x-8)(x+9)

Answer 1

y-intercept = -72 → (0, -72)

Explanation:

y-intercept is for x = 0.

Put x = 0 to the equation of a function f(x) = (x - 8)(x + 9):

f(0) = (0 - 8)(0 + 9) = (-8)(9) = -72