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Analyzing Coordinate Plan: Line Slope Calculation

Learn to draw coordinate plans, understand slopes of lines and solve for variables using proportions. Practice problems provided.

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Analyzing Coordinate Plan: Line Slope Calculation

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  1. Homework Read: p. 307-311 Do: p. 311 – 314: 1, 3, 5, 7, 13, 15, 17, 19, 23, 25, 29 ObjectivesSWBAT: Draw the coordinate plan and label all important aspects Bell Ringer

  2. The slope of a line that goes through the points (r, 6) and (4, 2) is 4. Find r. To solve this, plug the given information into the formula

  3. To solve for r, simplify and write as a proportion. Cross multiply. 4(4 – r) 1(-4) =

  4. Simplify and solve the equation.1(-4) = 4(4 – r) -4 = 16 – 4r -16 -16 -20 = -4r -4 -4 5 = r The ordered pairs are (5, 6) and (4, 2)

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