Given f(1)=4,f(2)=6,f(3)=8f(1) = 4, f(2) = 6, f(3) = 8f(1)=4,f(2)=6,f(3)=8, identify the function rule.
f(x)=x+3f(x) = x + 3f(x)=x+3
f(x)=2x+2f(x) = 2x + 2f(x)=2x+2
f(x)=4xf(x) = 4xf(x)=4x
f(x)=3x+1f(x) = 3x + 1f(x)=3x+1