| y-intercept (b) | 0 |
|---|---|
| Line equation | y = 2x + 0 |
| Percent grade | 200% |
| Perpendicular slope | -0.5 |
| Midpoint | 2, 4 |
m = (y₂ − y₁) ÷ (x₂ − x₁) = (6 − 2) ÷ (3 − 1) = 4 ÷ 2 = 2; angle = atan(2) = 63.43495°; b = y₁ − m·x₁ = 0.
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