Question

help with algebra 1 chapter 12 chapter wrap up Find the indicated outputs for these functions. 3. f ( x ) = 3x - 4 ; find f ( 2 ) , f ( 0 ) , and f ( -1 )

Answer 1

Given the function:

`f(x)=3x-4`

• You need to substitute this value of "x" into the function and then evaluate:

`x=2`

In order to find:

`f(2)`

Then, you get:

`f(2)=3(2)-4=6-4=2`

• Substitute this value of "x" into the function and then evaluate:

`x=0`

In order to find:

`f(0)`

You get:

`f(0)=3(0)-4=-4`

• Now you need to substitute this value of "x" into the function and then evaluate:

`x=-1`

In order to find:

`f(-1)`

You need to remember the Sign Rules for Multiplication:

`\begin{gathered} (+)(+)=+ \\ (-)(-)=+ \\ (-)(+)=- \\ (+)(-)=- \end{gathered}`

Then, you get:

`f(-1)=3(-1)-4=-3-4=-7`

Hence, the answer is:

`\begin{gathered} f(2)=2 \\ f(0)=-4 \\ f(-1)=-7 \end{gathered}`