During the period 1990-2004 the average commute to work in the greater washington, d.c area increased from 20 minutes in 1990 (t=0) by an average of 3 minutes per year. Use these data to express y, the average number of minutes commuting to work, as a linear function of x, the number of years since 1990.
I set it up as y=3t+20t
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almost. why 20t?
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