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

y-intercept = - 72 → (0, - 72)

Step-by-step 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