Question

Given f(x)=3x-8,find the range for the domain {-4,2,7}pls show work

Answer 1

Answer:

{-20,-2,13}

Explanation:

Given f(x)=3x-8 for the domain {-4,2,7}.

When x=-4

$\begin{gathered} f(-4)=3(-4)-8 \\ =-12-8 \\ =-20 \end{gathered}$

When x=2

$\begin{gathered} f(2)=3(2)-8 \\ =6-8 \\ =-2 \end{gathered}$

When x=7

$\begin{gathered} f(7)=3(7)-8 \\ =21-8 \\ =13 \end{gathered}$

So, the range for the given domain is:

$\{-20,-2,13\}$