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

(Assume grid lines are spaced 1 unit apart)

 Apr 10, 2020
 #1
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+1

Graph the line x=-1 and count how many times the red graph crosses it.

x=-1 crosses it 4 times, around 3, 1.5, -1.5, and -4.

 Apr 11, 2020
 #2
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Thank you so much!

 Apr 16, 2020

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