Answer:
The value of a is 1.
Step-by-step explanation:
To find the missing coordinate, we can use the slope equation and plug in all known values.
m(slope) = (y2 - y1)/(x2 - x1)
10 = (a + 9)/(-4 + 5)
10 = a + 9/1
10 = a + 9
Now we can solve for a
10 = a + 9
1 = a
