How to Use:

• Enter a point (x₁, y₁) and slope (m) OR
• Enter two points (x₁, y₁) & (x₂, y₂) to find the equation.
• Click Calculate Equation to get results.
• Formulas Used:
• $m = \frac{y_2 - y_1}{x_2 - x_1}$
• $y = mx + b$
• Parallel: $y = mx + b'$ (Same slope, new intercept)
• Perpendicular: $m' = -\frac{1}{m}$ (Negative reciprocal slope)
• If x₁ = x₂, the equation is $x = \text{constant}$ (vertical line).