1. suppose you bought a new car in december 2010 for $15,000.
a. according to the rule of thumb, what would the car be worth at each of these times?
i. december 2011
ii. december 2015
iii. december 2020
b. develop a general formula for the value of the car t years after it’s purchase.

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step-by-step explanation:

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answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33

answer is 17