Pick 2 points, and use the formula:
slope = (y₂ - y₁)/(x₂ - x₁)
let (x₁, y₁) = (5,3)
let (x₂, y₂) = (0,2)
Plug in to corresponding areas
(y₂ - y₁)/(x₂ - x₁) becomes (2 - 3)/(0 - 5)
Simplify
-1/-5, or 1/5
1/5 is your answer
hope this helps
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