SOLUTION: Jane has a balance of $175 in her savings account after 7 weeks. At the end of 15 weeks her balance is $375. Assume that she put the same amount into the account every week and w

Question 549089: Jane has a balance of $175 in her savings account after 7 weeks. At the end of 15 weeks her balance is $375. Assume that she put the same amount into the account every week and will continue to do so. I need help writting an equation.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Jane has a balance of $175 in her savings account after 7 weeks. At the end of 15 weeks her balance is $375. Assume that she put the same amount into the account every week and will continue to do so. I need help writing an equation.
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You have two points: (7,175) and (15,375)
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Slope = (375-175)/8 = 200/8 = 25 (amt. she added each week)
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y = mx + b
Solve for "b":
175 = 25*7 + b
b = 0
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y = 25x is the equation
Cheers,
Stan H.
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