Question

The function f(x)=-(x+5)(x+1) is shown below. What is the range of the function?

(a) all real numbers greater than or equal to 4.
(B) all real numbers less than or equal to -3.
(C) all real numbers less than or equal to 4.
(D) all real numbers greater than or equal to -3.

Answer 1

(C).

Explanation:

From the graph we see that the maximum value of the function is 4.

So the range is all real numbers less than or equal to 4.

Answer 2

C because the parabola opens down and the vertex is equal to or less than 4.