State the y-intercept of each of the following equations. Bell Ringer State the y-intercept of each of the following equations. 1. Y = 4X + 9 2. Y = -1/2X – 2 3. X + y = 4 4. -2x + Y = -6

Announcements May 8 – Math Placement Test 2 Possibilities: Year Long Algebra 1 Algebra 1A/1B May 8 – Last Day to turn in Late Work May 11 – Awards Night @ 6:00

Homework Check 1. Y = -X and Y = X - 4 8. Y = 2X and Y = X + 1 13. X + Y = 3 and X – Y = -3

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Section 8.10 Solving Systems of Equations Graphing R drive > Key > April 27_May 1 > 5_1__8.10 Systems Graphing Continued File > Save As > R drive > Math > April 27_May 1 > 5_1__8.10 Systems Graphing Continued

Example 1 No Solution & infinitely many solutions Solve each system of equations by graphing. y = -x + 1 y = -x + 3

Example 2 No Solution & infinitely many solutions Solve each system of equations by graphing. y = 2x + 4 1/2y – x = 2

Notes

Example 3 No Solution & infinitely many solutions Solve each system of equations by graphing. y = x + 4 y = x

Example 4 No Solution & infinitely many solutions Solve each system of equations by graphing. y = ½ x – 1 x – 2y = 2

Example 5 No Solution & infinitely many solutions Solve each system of equations by graphing. y = -x – 3 2x + 2y = -6

Example 6 No Solution & infinitely many solutions Solve each system of equations by graphing. y = 2x y = 2x - 4

Notes When the graphs of a system of equations have: * Different Slopes>>>Exactly 1 Solution * Same Slope, Different Y – Intercepts>>> No Solution * Same Slope, Same y – intercept>>> Infinitely Many solutions

Class Work Section 8.10 Graphing Solve each system of equations by graphing. 4. 5. 6. 7.

Class Work Section 8.10 Graphing Solve each system of equations by graphing. 10. 9. 3 8.