The measure of the angle shown on the right is

°

You need to calculate the angle counter clockwise

you can see that you have essentially a half circle (180°)+the diagonal (45°)=225°
additionally you have 2 lines/circles "underneath" the angle so you know you need to add 2 full circles (360° each):
225+360*2=225+720=945° which should be your solution

There is no graph but what i can say is that 1 is the slope and that -2 is the y- intercept