Question

The function f is defined by f(x)=7x−5. Use this formula to find the following values of f.

f(3)

Answer 1

f(3) = 16

Explanation:

Put 3 where x is and do the arithmetic.

... f(3) = 7·3 -5 = 21 -5 = 16

Answer 2

f(3) = 16

Explanation:

f(x)= 7x-5

We want to find the value when x=3

f(3) = 7*3 -5

f(3) = 21-5

f(3) = 16