Many of the following problems can be modeled with a linear equation. Analyze them and identify what quantities the variables x and y represent. The information provided in the problems is adequate to determine a point and a slope or two points on the line.
When their daughter Rhonda was studying in Japan, the Ward family enrolled in their phone company’s International Call Plan with a monthly fee of $4.95 and a cost of 12 cents per minute called. Find the linear equation that relates total monthly cost to the number of minutes called.
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