Question

The domain of the function, y=2x+4 is {3, 5,6,8}. Identify the range

Answer 1

Domain is the x-values

Range is the y-values

To identify the range, plug in the x-values they gave you into the equation to find its y-value

x = 3

y = 2x + 4       Plug in 3 for x

y = 2(3) + 4

y = 10

x = 5

y = 2x + 4    Plug in 5 for x

y = 2(5) + 4

y = 10 + 4

y = 14

x = 6

y = 2x + 4       Plug in 6 for x

y = 2(6) + 4

y = 16

x = 8

y = 2x + 4      Plug in 8 for x

y = 2(8) + 4

y = 20

The range is {10, 14, 16, 20}