Answer:
-650
Step-by-step explanation:
B: (0, a)
C should have the same y value as B
D: (a,0)
C should have the same x value as D
So point C is (a,a)
Since point A is on the origin, its point is (0,0)
You use the slope formula and plug in point A and C:
m = 1
So the value that belongs in the green box is 1
The one that passes through the origin. That one in the lower left part.
Small is the blank which is th answer