Answer:
13
Step-by-step explanation:
On a coordinate plane, a triangle has points (negative 4, 3), (negative 4, negative 2), (1, negative 2).
The points (-4,3), (1,2) and (-4, -2) would form a right triangle when graphed and connected by lines.
(-4,3), (1,2) and (1,3) would also work as well
#7
vertical x = 5
and
horizontal y=6
#8
vertical x = -2
horizontal y=-3
btw
#10: -10x - 3
#11: -5x -3