Content Objective: Students will be able to solve a system of linear equations both graphically and algebraically using substitution.
Language Objective: Students will be able to interpret the solution of a system of equations and explain that solution in the context of the problem situation both orally and in writing.
Complete Group Investigation- Pens-R-Us
Students use both graphs and substitution to determine the "break-even point" for a company that manufactures and sells pens in bulk.
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