what is the output of this function when the input is 5?

Explanation:

Step1: Locate x - value on graph

Locate x = 5 on the x - axis.

Step2: Find corresponding y - value

Move vertically from x = 5 until intersecting the function graph, then move horizontally to find the y - value on the y - axis. The y - value at x = 5 is 2.

Answer:

2