`f(-1)` Find the value if f(x) = 3x - 4

Textbook Question

Chapter 2, 2.3 - Problem 61 - Glencoe Algebra 2 (1st Edition, McGraw-Hill Education).
See all solutions for this textbook.

2 Answers | Add Yours

mathace's profile pic

mathace | (Level 3) Assistant Educator

Posted on

You are given f(x)=3x-4 and you are asked to find f(-1).  The x=-1

Substitute the -1 into f(x)=3x-4.

                                f(-1)=3(-1)-4

                                f(-1)=-3-4

                                f(-1)=-7

Therefore, the value of the function when x=-1 is -7.

Educator Approved

Educator Approved
kspcr111's profile picture

kspcr111 | In Training Educator

Posted on

Given

`f(x) = 3x - 4`

Now to find` f(-1) => x = (-1)`

so,

`f(-1) = 3(-1)-4`

         `= -3 -4 = -7`

so, `f(-1) = -7`

We’ve answered 318,911 questions. We can answer yours, too.

Ask a question