Question 927543
f(x) = -5x

another way to write this is 

y= -5x   

The domain is all the x values that you plug in.  

The range is the y values or f(x) values.

For this problem, the domain is {1,2,3,4}.

f(1) = -5(1) = -5
f(2) = -5(2) = -10
f(3) = -5(3) = -15
f(4) = -5(4) = -20

therefore, the range is {-5,-10,-15,-20}