Explanation
to evaluate the function, replace x for the given value, so
[tex]f(x)=-5x+8[/tex]Step 1
a) at x=-8
replace.
[tex]\begin{gathered} f(x)=-5x+8 \\ f(-8)=-5(-8)+8 \\ f(-8)=40+8 \\ f(-8)=48 \end{gathered}[/tex]Step 2
b) ax x=5
replace.
[tex]\begin{gathered} f(x)=-5x+8 \\ f(5)=-5(5)+8 \\ f(5)=-25+8 \\ f(5)=-17 \end{gathered}[/tex]I hope this helps you
