Place bottle tops, top-side up, to make a shape. Record the co- ordinates of the corners of the shape. Place another set of bottle tops, teeth-side up, to show the image of the shape when it has been enlarged by a scale factor of 2 from the origin. Record these new co-ordinates. Compare the two sets of co-ordinate pairs. Show different shapes enlarged by a scale factor of 2 from the origin. Note the co-ordinates and investigate how the sets of co- ordinates are related. Now try enlargements of other scale factors such as 5, 1/2, -2. Try enlargements from points other than the origin
