8 3 Notes
Download as PPT, PDF0 likes1,042 views
This document discusses how to graph linear equations using intercepts. It explains that the x-intercept is the x-coordinate where the graph crosses the x-axis and the y-intercept is the y-coordinate where the graph crosses the y-axis. To find the intercepts, set either x or y equal to 0 in the equation and solve for the other variable. Using the intercepts, linear equations can be graphed by plotting the points where they cross the axes.
8 3 Notes
- 1. Chapter 8 – Functions and Graphing 8.3 – Graphing Linear Equations Using Intercepts
- 2. The graph of a linear function may cross either the x -axis, the y -axis, or both axes.
- 3. Intercepts The x -intercept is the x -coordinate of the point where the graph crosses the x -axis. The y -intercept is the y -coordinate of the point where the graph crosses the y -axis.
- 4. Identify the x- and y-intercepts.
- 5. The y -intercept and x -intercept can be used to graph a linear equation. To find the x -intercept, let y = 0 in the equation and solve for x . To find the y -intercept, let x = 0 in the equation and solve for y .
- 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. Some linear equations have just one variable. Their graphs are horizontal or vertical lines.
- 8. Questions? Homework: 8.3 WKS