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Precalculus

Connect algebra and geometry. Explore functions, coordinates, and the ideas that come next. Choose a lesson to find its video, step-by-step examples, notes, and practice.

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Unit 1 · Lesson 1 · Section 1.1

Rectangular coordinates

Give every point a place. Use coordinates to describe position, measure distance, and find the halfway point.

Video · Worked examples · 4 printable PDFs