Concept explainers
A school bought 100 rolls of wrapping paper for a total of $150. As a fund-raiser, the school will sell the rolls of wrapping paper for $6 each. This situation gives rise to a profit function whose independent variable, x, is the number of rolls sold and whose dependent variable, y, is the total profit the school makes when that many rolls are sold.
- Make a table and draw a graph for the proflt function.
- Find an equation for the profit function, and explain why your equation is valid.
- Where does the graph of the profit function cross the xaxis? What is the significance of this point in terms of the school’s fund-raiser?
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MATH FOR ELEMENTARY SCHOOL TEACHERS
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