20 | Using the | Patterns and Relations |
♦Ask: Based on your observation of the graphs of the equations, what conclusions would you draw about the equations you graphed? Have students report findings. This could lead to a discussion of equivalent expressions and simplifying expressions.
♦Have students substitute X = 57 in the equations to find a value for Y. This will also show the equivalency of the equations.
Assessment Suggestions
Have students repeat the above activity for the following situation.
The architect designs the roof trusses with another design. It is made from equal lengths of steel beams arranged in the form of equilateral triangles, as in the diagram below.
1 length
2 lengths
3 lengths
Note that one more length is always in the bottom of the trusses than on the top.
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