1. Chapter 7-1 continued

2. Warm up Solve the following by graphing: y = 4x2x – y = 3 y = -3xy = x + 4 Write in standard form:y = -.5x +.75 What is the equation of a line perpendicular to y = 2x -1 and passing through the point (-2, 4). Write in any form.

3. What do you notice about the following system of equations? y = 2x -4y = -3x + 4y =.75x - 9 y = 2x – 10y = -3x – 6 y =.75x - 8

4. When we have a system of equations with the same slope we know…..

6. When we have a system of equations that have the same slope AND the same y-intercept we know that…..

8. Examples 4x + y = 6 Y = -4x - 1

9. Example y = x + 2 y + 2x = -3

10. Example

11. Steps we take to solve a system of equations with graphing: 1. 2. 3. 4.

12. Practice y = -2x – 44x – 2y = 8y = x y = -2x -38x – 4y = 16y = 3x + 2

13. Homework Page 343 #’s 15-23, 25-32