The functon is f(x) = 2x -3.
Substitute -2 for x in the function to obtain the value of f(-2) .
[tex]\begin{gathered} f(-2)=2\cdot(-2)-3 \\ =-4-3 \\ =-7 \end{gathered}[/tex]
So f( -2 ) = -7.
(b)
Substitute 7 for x in the function to obtain the value of f(7).
[tex]\begin{gathered} f(7)=2\cdot7-3 \\ =14-3 \\ =11 \end{gathered}[/tex]
So answer is f( 7 ) = 11.
(c)
Substitute -4 for x in the function to obtain the value of f( -4 ).
[tex]\begin{gathered} f(-4)=2\cdot(-4)-3 \\ =-8-3 \\ =-11 \end{gathered}[/tex]
So answer is f( -4 ) = -11.
