First, express in slope-intercept form: ( solve for y)
x+y= 5
x+y= 3
y= -x + 5
y= -x + 5
y=mx+b
where:
m= slope ( rise/run)
b= y-intercept ( where the line crosses the y axis)
So, for the first equation:
y= -x + 5
m= -1 ( goes 1 unit down for every unit to the right)
b= 5 ( crosses the y axis at y=5)
Graph:
Same process for the second function:
y=-x+3
Since the lines are parallel, they never cross each other, so there is NO SOLUTION.
