Question

Systems of equations with different slopes and different y-intercepts have more than one solution.
Answer

Sometimes

Never

Always

Answer 1

Never

Answer 2

Slope different => They intersect at one point => One solution

Answer 3

Well, one can make a claim that x=constant lines have no defined slope and therefore blah blah blah. But, those lines don't have a defined slope. So, they can't have "different slopes" either. So, I would exclude them.