Question

If f(x) = 2x + 2, find f(5).

10

12

9

5

Answer 1

f(x)=2x+2 is our function. This can also be written y=2x+2.

If we want to know f(5) for f(x), x=5.

Solve for x=5 in your original function.

Answer 2

10?

Answer 3

Now substitue X= 5 in given equation

=> f(5) = (2x5) + 2
=> 10+2
=> 12

Hence f(5) = 12