Giving all my points. and will mark brainliest

The 1/2 will change all values of f(x) to 1/2 f(x) so the graph of  f(x) will shrink vertically  by a factor of 1/2.

The third option is the correct one.

f(x) vs (a)(f(x))

if a<0, that is known as a vertical compresion

our 1st 3 option show a vertical compression

since a<0, it will shrink vertically by a factor o 1/2

last option, hmm, range is height or y value

by subtracting 2, you move it in the x direction so no change in range from that

however, vertically compressing it makes the y values smallers so range is different

answer is only the 3rd option, shrink vertically

the answer is two. hope this !