SOLUTION: two years after an expansion, a company had sales of $420,000. four years later, sales were $1,020,000. assuming that sales and time are related by a linear equation, determine the

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: two years after an expansion, a company had sales of $420,000. four years later, sales were $1,020,000. assuming that sales and time are related by a linear equation, determine the      Log On


   

Question 540480: two years after an expansion, a company had sales of $420,000. four years later, sales were $1,020,000. assuming that sales and time are related by a linear equation, determine the expected sales in another 6 years.
Answer by stanbon(75887) About Me  (Show Source):
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two years after an expansion, a company had sales of $420,000. four years later, sales were $1,020,000. assuming that sales and time are related by a linear equation, determine the expected sales in another 6 years.
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You have 2 points (0,420,000) and (4,1020000)
slope = (1020000-420000)/4 = 150,000
intercept: note that sales(0) = 420,000
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Equation:
sales = 150,000*(year) + 420,000
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Note: Another 6 years means 'the 10th year'.
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s(10) = 150,000*10+420,000
s(10) = 1,500,000 + 420,000 = 1,920,000
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Cheers,
Stan H.
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