Below is the graph of a trigonometric function. It intersects its midline at (-10.7, -3) and again at (-5.5, -3)
4
3
2-
1-
-14-13-12-11 -10 -9
-8 -7 6 5 4 3 2
(-10.7, 3)
(5.5.3)
-3
-6

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 =