CHAPTER 1 · RESOURCES

BUILD — Concept Note

Think first. Use AI purposefully. Verify always.

A concise revision of the approved lesson. For discovery, interaction and guided reasoning, return to the lesson.

CONCEPT

Building the Cartesian Plane

The x-axis is horizontal; the y-axis is vertical.
Their intersection is the origin, named O.
In the usual orientation, right and up are positive; left and down are negative.
Use equal intervals for equal units on each axis. Here both axes use the same unit size.

Draw perpendicular axes, align their zero marks, label x and y, and mark the scale and positive directions.

Build a plane where one grid interval represents one unit. Locate the origin and show the positive directions.

Mark equal unit intervals. Positive x points right; positive y points up.

Do not swap the axis labels or use unequal spacing for equal units.

Someone labels the horizontal line y and the vertical line x. Does this match the convention used in this module?

Check your reasoning

No. In this module the horizontal line is the x-axis and the vertical line is the y-axis.