This lesson is based on the systems of equations lesson from the LAUSD instructional guide.

These prior concepts are being built on/reinforced:

• Deriving equations from graphs
• Solving systems of equations
• Analyzing word problems.

The new concept being introduced/combined with the above is different scaling of the different axes.

To this end, the suggestion is to start off with a whole class discussion of just the graph displayed on a transparency or via projector. Then the worksheet is worked on in groups, with prompts given by the teacher to each group as appropriate.