8 3 Notes

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Ch 8 Functions

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8 3 Notes

  1. 1. Chapter 8 – Functions and Graphing 8.3 – Graphing Linear Equations Using Intercepts
  2. 2. The graph of a linear function may cross either the x -axis, the y -axis, or both axes.
  3. 3. Intercepts <ul><li>The x -intercept is the x -coordinate of the point where the graph crosses the x -axis. </li></ul><ul><li>The y -intercept is the y -coordinate of the point where the graph crosses the y -axis. </li></ul>
  4. 4. Identify the x- and y-intercepts.
  5. 5. The y -intercept and x -intercept can be used to graph a linear equation. <ul><li>To find the x -intercept, let y = 0 in the equation and solve for x . </li></ul><ul><li>To find the y -intercept, let x = 0 in the equation and solve for y . </li></ul>
  6. 6. Find the x -intercept and the y -intercept for each equation. Then graph the equation. x + 2 y = 4 y = 3 x - 6
  7. 7. Some linear equations have just one variable. Their graphs are horizontal or vertical lines.
  8. 8. Questions? <ul><li>Homework: </li></ul><ul><ul><ul><li>8.3 WKS </li></ul></ul></ul>

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