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# Predicting Car Sales

SATMAT-EBTL4K

A car dealer finds that as she increases the asking price for a certain model of car, the number of cars she sells decreases linearly. In particular, past data show that for every ${\$1000} $increase in price, she loses$5$customers. If she lists the asking price at$ {\$20,000}$, she sells $5$ cars.

Which function shows the number of cars sold, $N$, as a function of the asking price, $p$?

A

$N(p)=21,000-\cfrac { -5 }{ 1000 } p$

B

$N(p)=-5p+21,000$

C

$N(p)=105-\cfrac { 5 }{ 1000 } p$

D

$N(p)=\cfrac { 5 }{ 1000 } p-105$