Graphing by Plotting Points
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The graph of an equation in two variables is every point whose coordinates make the equation true; plotting enough points reveals its shape.
Show
For y = 2x − 1: x = 0, 1, 2 gives the points (0, −1), (1, 1), (2, 3) — already lining up.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.