Please Help!
With a math homework.

For #3:

y = 1/2x, x = -18

Plug in -18 for 'x':

y = 1/2(-18)

y = -9

For #4:

y = -4x + 6, x = 1

Plug in 1 for 'x':

y = -4(1) + 6

y = -4 + 6

y = 2

1.
2.
Both relations are functions.

3.
4.

5. It's easy to notice it's a linear function.