-13x + 9y = 20
The first thing we must do for this case is clear and:
9y = 13x + 20
y = (13/9) x + 20/9
Remembering that the generic equation of the line is:
y = mx + b
We conclude that:
m = 13/9
b = 20/9
Answer:
y = (13/9) x + 20/9
m = 13/9
b = 20/9