Question 1043290: A lamp is bought for $240 and sold six years later for $60.
a) Find the depreciation equation. Found 2 solutions by stanbon, Edwin McCravy:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A lamp is bought for $240 and sold six years later for $60.
a) Find the depreciation equation.
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You have 2 points:: (0,240) and (6,60)
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slope = (60-240)/(6-0) = -180/6 = -30
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V(t) = -30t + 240
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Cheers,
Stan H.
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When 0 years had passed since the lamp was bought,
it was worth $240.
When 6 years had passed since the lamp was bought,
it was worth $60.
Let x = the number of years that had passed since
the lamp was bought.
Let y = the dollar amount that the lamp was worth
when x years had passed.
Then when x = 0, y = $240
And when x = 6, y = $60.
So this is the same as the problem:
Find the equation of the line that passes through
the points
(0,240) and (6,60)
Edwin
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