Answer :
With this function you are given 2 x's and all we have to do is plug those X's into the function so
f(-1)=4*7^-1
7^-1 is 1/7
times 4 = 4/7
f(2)=4*7^2
7^2=49 *4 = 196
f(-1)=4*7^-1
7^-1 is 1/7
times 4 = 4/7
f(2)=4*7^2
7^2=49 *4 = 196