Answer: y=-.667x+1
Explanation:
1. Firstly, substitute the coordinates of the two points into the slope intercept equation: 
 
(1) y₁ = mx₁ + b 
 
(2) y₂ = mx₂ + b 
 
2. Then, subtract the first equation from the second: 
 
y₂ - y₁ = m(x₂ - x₁) 
 
3. Finally, divide both sides of the equation by (x₂ - x₁) to find the slope: 
 
m = (y₂ - y₁)/(x₂ - x₁) 
 
4. Once you have found the slope, you can substitute it into the first or second equation to find the y-intercept: 
 
y₁ = x₁(y₂ - y₁)/(x₂ - x₁) + b 
 
b = y₁ - x₁(y₂ - y₁)/(x₂ - x₁)