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# 2-2

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Chapter 2, Lesson 2

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### 2-2

1. 1. 8 th Grade Algebra 1-A Chapter 2-2 The Coordinate Plane
2. 2. Terms and Concepts (A) <ul><li>The coordinate system: formed by the right angle intersection of two number lines. The lines intersect at coordinate 0. </li></ul><ul><ul><li>Look at example on top of page 58 </li></ul></ul>
3. 3. Terms and Concepts (B) <ul><li>Origin: the point located at (0, 0) on a coordinate plane. </li></ul><ul><li>Y-axis: the vertical number line (north, south) </li></ul><ul><li>X-axis: the horizontal number line (east, west) </li></ul><ul><li>Coordinate plane: the plane that contains the x and y axis </li></ul>
4. 4. Terms and Concepts (C) <ul><li>Ordered pair: used to locate any point on a coordinate plane. </li></ul><ul><ul><li>The first number gives the x-axis coordinate </li></ul></ul><ul><ul><li>The second number gives the y-axis coordinate </li></ul></ul><ul><li>Quadrant: four regions of the coordinate plane created by the x-axis and y-axis intersection. </li></ul><ul><ul><li>1: (+,+) </li></ul></ul><ul><ul><li>2: (-,+) </li></ul></ul><ul><ul><li>3: (-,-) </li></ul></ul><ul><ul><li>4: (+,-) </li></ul></ul>
5. 5. Class assignment <ul><li>Work the examples on pages 59-60 </li></ul><ul><ul><li>Problems 1-8 </li></ul></ul><ul><li>Work on page 56 </li></ul><ul><ul><li>Problems 4-33 (evens) </li></ul></ul>
6. 6. Homework Assignment <ul><li>Do page 9 questions 1-30 (all) from the practice workbook. </li></ul>