Answer:
[see below]
Step-by-step explanation:
Substitute the given value into the function and then solve.
With -7:
[tex]f(x)=6x\\\\f(-7)=6*-7\\\\\boxed{f(-7)=-42}[/tex]
With -1:
[tex]f(x)=6x\\\\f(-1)=6*-1\\\\\boxed{f(-1)=-6}[/tex]
With 1:
[tex]f(x)=6x\\\\f(1)=6*1\\\\\boxed{f(1)=6}[/tex]
With 7:
[tex]f(x)=6x\\\\f(7)=6*7\\\\\boxed{f(7)=42}[/tex]
