# Don’t forget to show your work!. Slope-Intercept Form Section 3.6.

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Don’t forget to show your work!

Slope-Intercept Form Section 3.6

Overview Using the y-intercept and the Slope to Graph a Line Equations in Slope-Intercept Form Graphing and Slope-Intercept Form Parallel and Perpendicular Lines

Graphing Lines Graphing by calculating two of more points Graphing without calculating y = mx + b

1 3 2 4 5 -3 -2 -4 -5 -3-2-4-513245 x y

Using the y-intercept and the Slope to Graph a Line Calculating slope –Change in y divided by change in x –Rise over run Finding y-intercept

Equations in Slope-Intercept Form Standard form of a linear equation Alternate form Slope-intercept equation

Graphing and Slope-Intercept Form Graph y = (¾) x + 5 Graph 2x + 3y = 3

Parallel and Perpendicular Lines Look at slope Parallel – slope are same Perpendicular – Product of slopes is –1 (or one is vertical and the other is horizontal)

Try This Write slope-intercept equation for a line that: –Has y-intercept (0, -1) and is parallel to 2x – 3y = 7 –Has y-intercept (0, -1) and is perpendicular to 2x – 3y = 7