1. Graphing Equations

2. Given an equation, student will be able to  Graph the equation of the line with 80% accuracy.  Identify slope and y-intercept with 100% accuracy.  Plot y-intercept coordinate with 100% accuracy. Student Objectives

3. Materials Needed for Today Please have the following on your desk:  Graphing paper  Ruler  Graphing calculator  Two handouts found on the assignment table

4. Review

5. Quick Reminder  When slope is positive:  When slope is negative:  When slope is zero:

6. Five Steps to Graph an Equation  Step 1: Put the formula in y-intercept form.  Step 2: Identify the slope and y-intercept coordinates.  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator.

7. Example 1

8. Continued  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,-3) (1,-1)

9. Example 2  Step 2: Identify the slope and y- intercept coordinates. Slope = 1 y-intercept coordinates (0, 2)

10. Continued  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,2)(1,3)

11. Example 3

12. Continued  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator. y-intercept (0,3) (4,0)

13. Example 4

14. Continued  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator. (1,3)

15. Online Resources  National Library of Virtual Manipulatives National Library of Virtual Manipulatives

16. Continued  Equation Grapher Equation Grapher

17. Summary Remember the five steps to graph an equation:  Step 1: Put the formula in y-intercept form.  Step 2: Identify the slope and y-intercept coordinates.  Step 3: Plot y-intercept coordinates.  Step 4: Use slope to find a new point on graph.  Step 5: Connect the two points. Check with graphing calculator.

18. Assignment  Complete the page titled “Graphing Equations Practice” for homework. Assignment will be due tomorrow.

19. Questions?

20. Extra Credit Opportunity