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Mathematics 21 Online
OpenStudy (anonymous):

A car is initially 80 miles south of the border between two states and is travelling south. Distances D between the car and border are recorded in the table for various elapsed times t. Find a linear function given by D(t)=at+b that models these data. T (hours) 0 2 3 5 D (miles) 80 180 230 330

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