Which of the following situations would give you a system of equations that have at least 2 solutions?
a) Two lines are parallel and have different y-intercepts.
b) Two lines have the same slope and both pass through the origin.
c) Two lines are perpendicular and have the same y-intercept.
d) Two lines have negative slopes and different y-intercepts.

Question

Which of the following situations would give you a system of equations that have at least 2 solutions?
a) Two lines are parallel and have different y­-intercepts.
b) Two lines have the same slope and both pass through the origin.
c) Two lines are perpendicular and have the same y-intercept.
d) Two lines have negative slopes and different y­-intercepts.

kamibug · Answer

Well, really, if two lines are straight and not parallel, they can only cross each other once, unless ... they are right on top of each other :P That would mean infinetely many solutions. 
Which of the choices would be the two lines in the same place? :)