Question

For each function, what is the output of the given input?
For f(x)= 4x+7, find f(4)

Answer 1

Replace all x with 4

f(4)= 4*4+7

f(4)=16 +7

=23

Answer 2

Ok so you have to replace all x by 4:

F(4)= 4.4+7= 23