9-9   Picturing Multiplication with Negative Numbers

1.    On the coordinate graph, graph the line segment with endpoints A = (2,3) and B = (4,1).
       Graph its image under a size change of magnitude -2.

        a.) Did its length get longer or shorter?  ____________

        b.) Did A and B in the new image appear to switch places?  ____________

        c.) If you connect A to A' and B to B', at what point do the two lines cross?  ______________

2.     Graph the triangle with vertices (-6,8), (2,4), and (2,-4).  Label it CWH.  Graph its image under
        a size change  of magnitude -1/2.

Back to Chapter 9