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Systems of Linear Equations
Real World Systems and Solutions
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At how many minutes do both companies charge the same amount?
20 Minutes
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At how many mnutes do both companies charge the same amount?
10 minutes
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At how many mnutes do both companies charge the same amount?
Never, the slope of the graphs of their rates is the same. Parallel lines never intersect.
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A Real World Dilemna!
Use your knowledge of solutions of systems of linear equations to solve a real world problem you might have already been faced with: Choosing the best cell phone plan
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At how many minutes do both companies charge the same amount?
20 minutes
When is Company T a better Value?
T is a better value from 0 to 20 minutes.
When is Company S a better Value?
S is a better value if you talk more than 20 minutes
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The pink region represents the cheaper segment of the chart.
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Graphing Calc
