Question

If y=2x+5 and the domain is {-3, -1, 4} find the range

A {-1, -7, 16}
B. {-1, 3, 13}
C. {-13, -7, 8}
D. {5, -7, 8}

Answer 1

B

Explanation:

for the range, substitute the values of x from the domain into y = 2x + 5

x = - 3 : y = 2(- 3) + 5 = - 6 + 5 = - 1

x = - 1 : y = 2(- 1) + 5 = - 2 + 5 = 3

x = 4 : y = 2(4) + 5 = 8 + 5 = 13

the range is then the corresponding values of y , that is

range { - 1, 3, 13 }