Algebra 1 Section 7.1 Solve systems of linear equations by graphing Recall: linear equation in 2 variables ax + by = c The solution to a system of equations.

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Presentation transcript:

Algebra 1 Section 7.1 Solve systems of linear equations by graphing Recall: linear equation in 2 variables ax + by = c The solution to a system of equations are the point(s)of intersection of the graphs. The solutions to a system of linear equations are all ordered pairs that are solutions to each equation. Is the ordered pair ( 2,3) a solution to the system: 5x – 2y = 4 3x + 2y = 12

To solve a system of linear equations by graphing 1. Graph each equation 2. Find their intersection Solve the system -x + 2y = 6 x + 4y = 24

Solve x + y = 3 -2x + y = -6

Solve using a graphics calculator ¾ x – ¼ y = - ½ ¼ x – ¾ y = 3/2

Page 400 ex 3 Science Club: Currently 400 daily visits and increasing at a rate of 25 per month Math Club: Currently 200 daily visits and increasing at a rate of 50 per month

assignment Page 401 Problems 12 – 36 even, 37,38,39