Question

Which function has a vertex on the y-axis?

O AO) = (x - 2)2
Of) = (x + 2)
f(x) = (x - 2)(x + 2)
of) = (c + 1)(x - 2)

Answer 1

f(x) = (x - 2)(x + 2)

Explanation:

When you expand out the expression, you should get f(x) = x² - 4, where only vertical movement is present. Therefore, the vertex is on the y-int at (0, -4) and your answer is the 3rd choice.