How much normally is retaking a high school class?

True or false look at the picture pls : /

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.