evaluate $4 - 2f$ when $f = 1$.

Explanation:

Step1: Substitute the value of ( f )

Substitute ( f = 1 ) into the expression ( 4-2f ). So we get ( 4 - 2\times1 ).

Step2: Perform the multiplication

Calculate ( 2\times1=2 ). The expression becomes ( 4 - 2 ).

Step3: Perform the subtraction

Calculate ( 4-2 = 2 ).

Answer:

( 2 )