Question

What is the y-intercept of the quadratic function
f(x) = (x – 6)(x – 2)?

(0,–6)
(0,12)
(–8,0)
(2,0)

Answer 1

Do you know how to expand \((x-6)(x-2)\) to standard form?

Answer 2

nope

Answer 3

Ok Just plug in 0 for x so (0-6)(0-2) = what

Answer 4

The y-intercept is when x = 0

So as SnipingSoup suggested, replace x with 0 and solve for f(x). That will tell you the y-intercept.

Remember when you're looking at your answer choices that points are written in the form of (x, y)

The x-value goes first and we know that's 0 since at the y-intercept x equals 0. That alone should help you eliminate two answer choices.

Answer 5

Also for any future questions, if you're trying to solve for the x-intercept you would do the opposite

The x-intercept is when y = 0 or when the line crosses the x-axis