The graph of y = f(x) is shown below, with one unit between grid lines. Assume f(x) is defined only on the domain shown. What is the sum of all integers c for which the equation f(x) = c has exactly 6 solutions?
Note that when f(x) = y = 1
We have the following
f(-3) = 1 f(-2) = 1 f (-1) = 1 f(1) = 1 f(2) = 1 f(3) = 1
Sum of all c^s = 6
