I think the equation should be

where 3 is the common ratio of the exponential function
so the answer is C.
Answer:
f(-2) = 2
Step-by-step explanation:
The question is asking for the y-value of the point located at x = -2 on the graph. The point is at (-2, 2), so f(-2) = 2.
Part a would be 8x7 = 56 and 60-56= 4 so she would need to sell 4 more games
Part b I’m not sure about. One person would have to but 4 video games I guess