Chapter 1
Introduction to Coordinate Geometry
Locate points precisely with coordinates, measure the distance and midpoint between them, and describe straight lines with slope and the equation y = mx + c.
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The Coordinate Plane
Distance and Midpoint
Lines on the Coordinate Plane
Special Lines and Applications
Try it yourself
🔬 Graphing Lines
Explore how slope and intercept change the graph of a line, in point-slope, slope-intercept, and standard form.
Try this: Drag the two points on the line, or type new values for slope (m) and y-intercept (b) directly.
Look for: Watch how the line rotates when you change only the slope, and how it shifts up/down when you change only the intercept — they move the line in different ways.
Simulation by PhET Interactive Simulations, University of Colorado Boulder — licensed CC BY-NC. View on phet.colorado.edu ↗