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

2 Answers

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.

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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`