Chapter 7-1 continued. 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.

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Presentation transcript:

Chapter 7-1 continued

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.

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

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

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

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

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

Example

Steps we take to solve a system of equations with graphing:

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

Homework Page 343 #’s 15-23, 25-32