Question

Given f(x) = 3x – 2, find f(-5).

Answer 1

f(-5)= -17

Explanation:

We want to find at what value of f(x), or y, does x=-5

So, to find when x=-5, or f(-5), substitute -5 in for x

f(x)=3x-2

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

Multiply first (PEMDAS)

f(-5)=-15-2

Subtract

f(-5)= -17

Hope this helps! :)

Answer 2

f(-5) = -17

Explanation:

f(x) = 3x – 2 Substitute -5 for x

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

f(-5) = -15 - 2 Subtract

f(-5) = -17