Ms. Brodie drew these box-and-whisker plots to represent her students' scores on the mid-year test and the final exam. What do the plots tell you about the test scores of Ms. Brodie's class?
Here's the image link

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =