SOLUTION: The average yearly salary for history graduate students was $5100 in 1986 and $15,000 in 2001. Write a linear equation that models this situation and use it to predict the average

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Question 179385This question is from textbook intermediate algebra
: The average yearly salary for history graduate students was $5100 in 1986 and $15,000 in 2001. Write a linear equation that models this situation and use it to predict the average yearly salary for 2010. This question is from textbook intermediate algebra

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
we are talking about a span of 15 years
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so we need to figure out how much the salary increased on a yearly basis
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15000-5100=9900 the amount of increase over 15 years
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9900/15=660
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so salaries have increased by 660 dollars per year
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S(t)=660t+5100.......is our equation :t is time in years
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2010 would be year 24
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S(24)=660(24)+5100=15840+5100=$20940
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so this equation predicts that the Avg Salary in 2010 will be $20,940