Answer:
130°
Step-by-step explanation:
a straight line is 180°
so you have
180°-50°= 130°
Use the slope equation:

Plug in the points (2, 15) and (0, -1).

⇒

= 8
The slope of the line is 8.
The trapezoid on the bottom right doesn’t belong. All the other quadrilaterals have opposite sides that are congruent.