52 x 552 What’s is the answer for that new to the app and testing it making sure its good and seeing if ima use it

What is the missing step in this proof ?

Ineed with this problem 21 show steps

5. (04.07)which of the following exponential functions goes through the points (1, 12) and (2, 36)? (2 points)f(x) = 3(4)^xf(x) = 4(3)^-xf(x) = 3(4)^-xf(x) = 4(3)^x