Question

the domain of f(x) is {-1,0,2}. if f(x)=3x+2, what is the range

Answer 1

when x = -1, f(x)=3(-1) +2 = -1
when x = 0, f(x)=3(0) +2 = 2
when x = 2, f(x)=3(2) +2 = 8

range: {-1, 2, 8|