Y 13 12 11 10 9 8 7 6 5 4 3 2 1 012345678x Example One Instructions: Make slope triangles to find the slope of the line slope = 5 high 5 wide 3 high 3.

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Equation of a line y = m x + b

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Presentation transcript:

y x Example One Instructions: Make slope triangles to find the slope of the line slope = 5 high 5 wide 3 high 3 wide slope = up/over

y x Example Two Instructions: Make slope triangles to find the slope of the line slope = 10 high 5 wide 6 high 3 wide

y x Example Three Instructions: Draw a line with y-intercept of 5 and slope triangle 2 high and 1 wide. Write the equation of the line. slope = 2/1 = 2 y-intercept = 5 y = 2x + 5

Topic: Graphing a line Homework: 7-37 Vocabulary: A slope triangle tells you how much a line goes up when it goes over. How high the triangle is tells you how much it goes up. How long the triangle is tells you how much it goes over.

Classwork One. Instructions: graph two lines on the same axis Draw a line with y-intercept of 1 and slope triangle 1 high and 1 wide. Write the equation of the line. Draw a line with y-intercept of 3 and slope triangle 1 high and 1 wide. Write the equation of the line. Draw a line with y-intercept of 2 and slope triangle 2 high and 1 wide. Write the equation of the line. Draw a line with y-intercept of 4 and slope triangle 2 high and 1 wide. Write the equation of the line. Draw a line with y-intercept of 2 and slope triangle 3 high and 1 wide. Write the equation of the line.

y x Example One Instructions: Draw a line with y-intercept of 2 and slope triangle 1 high and 3 wide. Write the equation of the line. slope = high/wide = 1/3 y-intercept = 2 y = ⅓x + 2

y x Example Two Instructions: Draw a line with y-intercept of 3 and slope triangle 1 high and 5 wide. Write the equation of the line. slope = high/wide = 1/5 y-intercept = 3 y = ⅕x + 3

y x Example Three Instructions: Draw a line with y-intercept of 4 and slope triangle 2 high and 3 wide. Write the equation of the line. slope = high/wide = 2/3 y-intercept = 4 y = ⅔x + 4

y x Example Four Instructions: Draw a line with y-intercept of 2 and slope triangle 4 high and 5 wide. Write the equation of the line. slope = high/wide = 4/5 y-intercept = 2 y = ⅘x + 2

Classwork Two. Instructions: graph two lines on the same axis Draw a line with y-intercept of 2 and slope triangle 1 high and 3 wide. Write the equation of the line. Draw a line with y-intercept of 3 and slope triangle 1 high and 2 wide. Write the equation of the line. Draw a line with y-intercept of 2 and slope triangle 2 high and 4 wide. Write the equation of the line. Draw a line with y-intercept of 4 and slope triangle 2 high and 2 wide. Write the equation of the line. Draw a line with y-intercept of 2 and slope triangle 3 high and 5 wide. Write the equation of the line. Draw a line with y-intercept of 2 and slope triangle 2 high and 5 wide. Write the equation of the line.