Question

Which function has a range of fyly ≤ 5}?

O f(x) = (x-4)² +5
Of(x) = -(x-4)² +5
O f(x) = (x - 5)² + 4
O f(x) = -(x - 5)² + 4

Answer 1

Answer: Option 2

Explanation:

The vertex must have a y-coordinate of 5, so eliminate options 3 and 4.

Also, since there must be a maximum, the coefficient of
`x^2` must be negative. So, eliminate option 1.

This leaves us with option 2.