Question

Find the range of f(x)=-x+4 for the domain (-3 -2 -1 1)

A.{7,6,5,3}

B.{7,6,5,4}

C.{-7,-6,-5,-4}

D.{-7,-6,-5,3}

Answer 1

If we substitute x = -3 in f(x) we have --3 + 4 = 7 which is one element in the range.

Doing the same calculation for x , -2, -1 and 1 we get 6, 5 and 3

Answer is choice A

Answer 2

f(-3) = --3 +4 = 3+4 =7

f(-2) = --2 +4 =2+4 =6

f(-1) =--1 +4 = 1+4 =5

f(1) = -1 +4 =3

Range :{3,5,6,7}

Choice A