Answer:
y = (5/4)x - 11
Explanation:
Use y = mx + b as your starting point. This becomes y = (5/4)x + b.
Substitute 8 for x and -1 for y and solve for b:
-1 = (5/4)(8) + b, or
-1 = 10 + b.
Then b must be -11, and the desired equation is
y = (5/4)x - 11