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Graph the line on graph paper.

  1. Draw a slope triangle.

  2. Rotate your slope triangle around the origin to get a new slope triangle. What is the new slope?

  3. Write an equation of a line perpendicular to .

    Look at the slopes in parts (a) and (b). How are perpendicular slopes related?

Use the eTool below to graph the function, then draw and rotate a slope triangle.
Click the link at right for the full version of the eTool: Int2 1-80 HW eTool