Which equation represents a line perpendicular to the line shown on the graph

Missy took the act and was told her standard score (z-score) is –1. frank took the sat and was told his standard score (z-score) is –2. which student has a better chance of getting admitted to college based on their test score?

Which choice represents the sample space ,s for this event

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.