Question 750896: An investment was worth $2500 in 1995. By 2000 it had grown to $3500. Let y be the value of the investment in year x, where x = 0 represents 1995. Assuming that the value of the investment increases in a linear fashion, write an equation that models the value of the investment in year x.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! An investment was worth $2500 in 1995. By 2000 it had grown to $3500. Let y be the value of the investment in year x, where x = 0 represents 1995. Assuming that the value of the investment increases in a linear fashion, write an equation that models the value of the investment in year x.
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You have 2 points: (0,2500) and (5,3500)
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slope = (3500-2500)/(5-0) = 1000/5 = 200
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intercept = f(0) = 2500
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Equation:
f(x) = 200x + 2500
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Cheers,
Stan H.
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