What is f(x)=4-8x Graph on chart:
f(x)=4-8xso if x=0, f(x)= 4if x=1, f(x)=-4if x=2, f(x)=-12so if x=-1, f(x)=4- (8·-1)=4-(-8)=4+8=12if x=-2, f(x)=4-(8·-2)=4-(-16)=4+16=20if x=-3, f(x)=4-(8·-3)=4-(-24)=4+24=28