I have no idea how to do this.
Find the range of j(x)=5-2x for the domain {-1,0,1}.
Just plug in the domain values and we have
5 - 2(-1) = 5 + 2 = 7
5 - 2(0) = 5 - 0 = 5
5 - 2(1) = 5 - 2 = 3
So... the range is just { 3, 5 , 7 }
Thank you!