Is this a function why or why not?

Step-by-step explanation:

This is a function.  Each element of the input set (domain) maps onto exactly one value of the output set (range).  If any element were to map onto more than one value, we'd not have a function.

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4

27 +27 or 27times 2=54

the diffrence is 0