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Calling Long Distance

Eighth and ninth graders build a cost table in dollars detailing the charges for long distance calling and graph the data found. Then they identify and name the linear function rules. They also find the point of intersection of pairs of lines from their linear function rules.

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Concepts
graphing linear equations, graphing, intersection, real-world applications, math applications, slope, systems of equations, table of values, unit rates, y-intercepts, intercepts
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Additional Tags
point of intersection, slope of a line, systems of equations, unit rate, contextualized situations, graph linear equations, real world application, table of values, unit cost, linear function rules, math
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