Question

What is the equation in vertex form of a parabola with vertex (-2, -2) that opens downward and is stretched by a factor of 5?

A) f(x) = −5(x + 2)^2 + 2
B) f(x) = −5(x − 2)^2 + 2
C) f(x) = 5(x + 2)^2 − 2
D) f(x) = −5(x + 2)^2 − 2

Answer 1

D). -5(x + 2)^2 - 2.

Explanation:

Parabola which Opens down and vertex (-2, -2) is :

f(x) = a(x + 2)^2 - 2 where a is negative

Stretch by factor 5 gives:

-5(x + 2)^2 - 2.