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How to Graph Dilation Activity

A dilation changes the size of an object on the graph. In order to graph the new object under dilation, you need to know the coordination of the points on the graph. For example, if you have a square or a rectangle, then you need to know the four corners. After you know these points, you need to know the scaling factor to apply it to these points. Remember, points are in the form of (x,y).

Instructions

- 1
  Find the coordinates of the corners of the object. For example, assume you have a triangle where the points are at (4,3), (1,1) and (7,1). For a circle, choose four points where you have two sets of points directly opposite of each other.
- 2
  Figure out what your scaling factor will be. In the example of the triangle, assume your scaling factor is 3.
- 3
  Multiply all the coordinates by your scaling factors. In the example, (4,3) times 3 equals (12,9), (1,1) equals (3,3) and (7,1) equals (21,3).
- 4
  Plot your new points on the graph paper.

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