6.2: Slope-Intercept Form. Linear Equations  An equation whose graph is a line is a linear equation. Ex. y = 3x – 4  The y-intercept is the y-coordinate.

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Presentation transcript:

6.2: Slope-Intercept Form

Linear Equations  An equation whose graph is a line is a linear equation. Ex. y = 3x – 4  The y-intercept is the y-coordinate of the point where the line crosses the y-axis.  The slope-intercept form of a linear equation is y=mx + b

Finding the Slope & Y-Intercept  Ex. y = 3x – 5  Ex. y = -2x + 1  Ex. y = 7/6x – ¾

Writing the Equation  Ex. Write the equation when the slope is 2 and the y-intercept is -8.  Ex. Write the equation given:

Graphing  Graph y = 3x – 1

Graphing

 The base pay of a water delivery person is $210 per week. He also earns 20% commission on any sale he makes. The equation t = s relates total earnings to sales, s. Graph the equation.

Assignment  P every 3 rd problem.