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Understanding the Coordinate Plane: Concepts and Plotting Points

This lesson introduces the coordinate plane, covering fundamental concepts such as axes, the origin, and quadrants. Students learn about the X-axis and Y-axis, how to identify points using ordered pairs, and directions for plotting points based on their coordinates. The lesson also explains the signs of the quadrants and guides students on movement for positive and negative values. With examples to reinforce learning, this material is essential for mastering the basics of coordinate geometry.

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Understanding the Coordinate Plane: Concepts and Plotting Points

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  1. The Coordinate Plane By: Stan Blackman Jay High School Lesson for Glencoe Algebra I Math Section 4-1 Algebra I Glencoe Mathematics 2004 The McGraw Hill Companies Inc.

  2. Vocabulary Words Axes - two perpendicular number lines used for locating points Origin – the intersection of the two axes Y-axis – the vertical number line X-axis – the hoizontal number line

  3. The four quadrants of the coordinate plane. Y-axis Quadrant I Quadrant II X-axis Quadrant IV Quadrant III

  4. Signs of the quadrants. Y-axis (+,+) (-,+) X-axis (-,-) (+,-)

  5. The Ordered Pair (5,10) X- coordinate Y- coordinate

  6. The Origin Point Y-axis Origin Point (0,0) X-axis

  7. Always start at the origin to plot a point.

  8. Direction of Movement for the X-Coordinate Y-axis If the x-coordinate is positive move this way If the x-coordinate is negative move this way X-axis

  9. Direction of movement for the Y-coordinate Y-axis If the y-coordinate is positive move this way If the y-coordinate is negative move this way X-axis

  10. Name the given point. Y-axis (1,3) (-2,1) X-axis (-5,-1) (4,0)

  11. How To Plot a Point on the Coordinate Plane Y-axis (4,4) Next move on the Y-axis X-axis (-3,-1) First move out on the X-axis

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