IntroLines
Slope-Intercept
y = mx + b
Overview
The slope-intercept form is the most intuitive way to write a line. m is the slope, b is the y-intercept.
Domain
(-∞, +∞)
Range
(-∞, +∞)
Key Properties
1
m = slope (rise over run)
2
b = y-intercept (where line crosses y-axis)
3
Easy to graph: start at b, move by slope
4
Most common form in algebra
Key Insight
When you see y = mx + b, you can instantly read the slope and where the line crosses the y-axis.
Visualize Slope-Intercept
Interact with the graph and explore this curve in the analytic geometry visualizer.