Stage 21 · Linear Functions

21.2.5 Finding Where the Line Meets the Axes

21.2 Linear Functions Arrive: Sliding the Whole Line

Point 5 of 5

21.2.5 Finding Where the Line Meets the Axes

Core idea

Set x=0 to get the y-axis crossing, and set y=0 to solve for the x-axis crossing (-b/k, 0).

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.
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