Question

How do you think you can find f(3) without using a graph?

Answer 1

Answer is to use the substitution method and solve

Step by step

f(3)

Given f(x) = 5x - 2

Substitute 3 for x the variable and solve

f(3) = (5)(3) -2

f(3) = 15 - 2

f(3)= 13

Solution (3,13) (0,-2)

Answer 2

`f(3) = 5x - 2`

`f(3) = 5(3) - 2`

`f(3) = 15 - 2`

`f(3) = 13`

Explanation:

f(3)=f(x)

it means x=3

and we we use it to find f(3)