Two Points
Point 1 (x₁, y₁)
Point 2 (x₂, y₂)
y = 2.0000x -1.0000
Results
Slope (m)
2.000000
Y-intercept
(0, -1.0000)
X-intercept
(0.5000, 0)
Distance
8.9443
Angle
63.43°
Δx / Δy
4.00 / 8.00
Frequently Asked Questions
What is the slope formula?
Slope (m) = (y₂ − y₁) / (x₂ − x₁) = rise / run. It measures how steep a line is. Positive slope goes up left-to-right; negative slope goes down. Slope of 0 = horizontal line; undefined slope = vertical line.
What is slope-intercept form?
y = mx + b, where m is the slope and b is the y-intercept (where the line crosses the y-axis). This is the most common form for graphing. Example: y = 2x + 3 has slope 2 and crosses y-axis at (0, 3).
How do I find the y-intercept from two points?
First calculate slope m = (y₂−y₁)/(x₂−x₁). Then use point-slope form: y − y₁ = m(x − x₁) and solve for b in y = mx + b. Or simply b = y₁ − m·x₁.
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