Stage 30 · Analytic Geometry
30.2.3 Point-Slope and Slope-Intercept Forms
30.2 Lines: Direction, Slope, and Equations
Point 3 of 5
30.2.3 Point-Slope and Slope-Intercept Forms
Core ideaKnow one point and the steepness and you can draw the whole line, y−y₀=k(x−x₀), and where it lands on the vertical axis gives y=kx+b.
Module goal. Start from how steep a line is, master slope and the various forms of a line's equation, and learn to write down any line in the coordinate plane.