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Louis is dilating triangle at right. He multiplied each -coordinate and -coordinate of triangle by .  

  1. What are the new coordinates of the points?

    Use the graph to find the coordinates of points , , and . Then multiply each value by . For example, point is originally . Its new coordinates will be . Find points and .

  2. Graph Louis’ new triangle.

    After multiplying each -coordinate and -coordinate by , plot the new points.

  3. Describe how triangle changed.

    Its sides are twice as long and rotated .

Triangle, A, B, C with vertices at the points A (negative 3, comma 2), B (negative 2, comma negative 2), C (1, comma 2).

Use the eTool below to graph Louis' new triangle.
Click the link at right for the full version of the eTool: 6-46 HW eTool