The graphic approach to systems of equations includes specific commands for the graphing calculator. Next comes work with a partner to complete a table calling for the generation of systems to give various types of solutions. The exercises for this section require a time commitment that is excessive for the number of actual problems completed. The next section begins with work with a partner using a given graph to estimate the solution of a system. Pairs then use the graphing calculator to graph the given equations and press Calc or Table to find the intersection point.
Pairs compare their estimate to the calculator exact answer.
Pairs are then asked choose to use paper and pencil or a calculator to solve 3 more systems, and explain why they chose a particular method. It seems odd that they would use paper and pencil since they have not been given the algebraic techniques. Again, the more powerful technique is being evaluated before it is given. Another way to solve a system is to use substitution. This is an inadequate representation of the distinctions among methods.