Homework Help: math-functions

Posted by Christa on Friday, August 12, 2011 at 7:51pm.

A car purchased for $11900 has a resale value of $2000 after 10 years. Assuming its resale value decreased linearly over these years, what was the resale value of the car after 3 years?

math-functions - Damon, Friday, August 12, 2011 at 8:19pm
two given ordered pairs:
(0,11900)
(10,2000)

m = slope = (2000-11900)/ (10 - 0) =-990 per year
so
11900 - 3(990) = 8930

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