what is the output of this function when the input is -6?

what is the output of this function when the input is -6?
Answer
Explanation:
Step1: Locate input on x - axis
Find x = - 6 on the x - axis.
Step2: Determine corresponding y - value
Move vertically from x = - 6 until intersecting the function graph, then move horizontally to read the y - value. The y - value at x=-6 is 0.
Answer:
0