HELP ASAP NO LINKS AND NO JOKES PLZ

1.

ΔX = 1 – -1 = 2

ΔY = 4 – 2 = 2

y = x + 3

2.

ΔX = 1 – -3 = 4

ΔY = 5 – -3 = 8

y = 2x + 3

3.

ΔX = 3 – 1 = 2

ΔY = 6 – 7 = -1

y = -0.5x + 7.5

4.

ΔX = 2 – -4 = 6

ΔY = -4 – 6 = -10

y = -1.6666666666667x – 0.66666666666667  

or

y =  -5x

Step-by-step explanation:

the first one, all those points on the line just make a strait line.

here is your mark brainliest