Step-by-step explanation:
1) x-y=3
sub two values
x=7,8
y=4,5
slope=rise/run=8-7/5-4
=1/1=1
2)7x-y=-3
x=1,2
y=10,17
rise/run=17-10/2-1
=7
3)4x+y=2
x=1,2
y=-2,-6
slope=-4/1
=-4
4) x-y=3
x=4,5
y=1,2
slope=2-1/5-4=1/1
=1
by subbing two values we can calculate the graduliant/slope from two random variables
use literally any two numbers as x
sub in calculate y
and calculate the slope from rise/run
