Question

what is the y - intercept of the quadratic function represented below? f(x)=(x - 10)(x + 2) a - 2 b 10 c - 10 d 20 e - 20 f 2

Explanation:

Step1: Recall y - intercept formula

The y - intercept of a function $y = f(x)$ is found by setting $x = 0$.

Step2: Substitute $x = 0$ into the function

Given $f(x)=(x - 10)(x + 2)$, when $x = 0$, we have $f(0)=(0 - 10)(0+2)$.

Step3: Calculate the value

$f(0)=(-10)\times2=-20$.

Answer:

E. - 20