The student recognizes the connection between ordered pairs of numbers and locations of points on a plane. Clarifying Activity Students choose a partner. One partner secretly places a small washer around a peg on a geoboard. The other partner tries to guess where the washer is by naming the ordered pair that identifies the location of the peg on the geoboard grid. The second partner continues to guess until he or she finds the location of the washer.
Students make a table showing the relationship between the number of CDs bought and the total cost.
On a coordinate grid, students locate the points that correspond to the ordered pairs from the table to graph the relationship and look for a geometric pattern.