14 and 15 are not functions while 13 and 16 are functions
If you use the dilation by a scale factor, it will be a graph of:
y = -3x
Which is the image.
ANSWER

EXPLANATION
The given expression is

This is having a negative index. We must first of all change to a positive index.
Recall that,

We apply this law of exponents to get,

We cab rewrite the given expression to obtain;

This will simplify to give us,