Answer:
y = 4/5 x - 2 1/5
Step-by-step explanation:
1. Find the slope:
1 - 5 = -4 = 4 = m
4 - 9 -5 5
2. Find b by plugging in the slope you just found and one of the points given into y = mx + b
1 = 4/5 ( 4) + b
1 = 16/5 + b
- 2 1/5 = b
3. Plug in the m and the b you found into y = mx + b
y = 4/5 x - 2 1/5
