College Algebra / Unit 3 Alg 122 short lesson, about 20 seconds
Graphing by Plotting Points
Captions available
The idea
The graph of an equation in two variables is every point whose coordinates make the equation true; plotting enough points reveals its shape.
In practice
For y = 2x − 1: x = 0, 1, 2 gives the points (0, −1), (1, 1), (2, 3) — already lining up.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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