Question

Please Help!
With a math homework.

Answer 1

1.
`(2,3),(6,4),(8,11),(10,4)`
2.
`(7,-13),(9,-9),(11,-5),(14,-1)`
Both relations are functions.

3.
`y(-18)=(1)/(2)\cdot(-18)=-9`
4.
`y(1)=-4\cdot1+6=-4+6=2`

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

`y=mx+b\\ m=(y_2-y_1)/(x_2-x_1)\\\\ m=(-10-(-5))/(2-1)\\ m=(-5)/(1)\\ m=-5\\\\ -5=-5\cdot1+b\\ b=0\\\\ \boxed{y=-5x}`

Answer 2

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