The graph of y=f(x) is shown in red below. For how many values of c is f(c) = -1?

https://latex.artofproblemsolving.com/7/4/5/745692871d4963aedcef20352e362e9107ab1ec0.png

(Assume grid lines are spaced 1 unit apart.)

This question is asking for how many times the y axis is equal to -1. We see that there are 2 times.

:)

I put in 2 as the answer but it said it was wrong. Are you sure it is right? It asked for the number of values for c.

Sorry, the answer is 4! Sillly me, I need to learn how to count...

Thank you so much! :D