21.2 Linear Functions Arrive: Sliding the Whole Line
Point 3 of 5
21.2.3 b Is Where the Line Crosses the y-Axis
Core idea
Slide that direct-proportion line straight up or down by b units, and where it lands, (0,b), is the intercept b.
Module goal. Generalize from direct-proportion functions to the general linear function y=kx+b, understand what b means geometrically, and draw the graph in full.
eastmath.com · 21.2 Linear Functions Arrive: Sliding the Whole Line · 21.2.3 b Is Where the Line Crosses the y-Axis