How do you graph parallel and perpendicular lines?
If you want to graph parallel lines, they need to have the same
slope (Ex. 2x+2 and 2x+3)- parallel lines cannot have the same
y-intercept because the two line would be the same.
Perpendicular lines slopes need have to be opposite reciprocals
(Ex. -2x+4 and +1/2x+3)- perpendicular lines can have the same
y-intercepts, it doesn't make a difference.