Okay, so you have the last option (g(x)=3^x+2-7) as your first line at that is aligned with the x-axis then movies up slightly into Quad. one. Your answer for this is going to be... C. g(x)=3^x-2-7.
You are going to graph these by using only a few selected points, then finding your answer.
Your horizontal Asymptote is y=-7.
x--------------y
-2 -6.988
-1 -6.963
0 -6.889
2 -6
3 -4
Hope this helps you!!!