Posted by **Emma** on Thursday, January 17, 2013 at 11:43pm.

A large factory knows that if it sells it's new gadgets for $10 each, it can sell 350 per month and if it sells the same gadgets for $8 it will sell 500 per month assuming the relationship between price and sales is linear predict the monthly sales of gadgets to the nearest whole number if the price is $6.

Im really confused

- Math -
**Steve**, Friday, January 18, 2013 at 4:42am
if the relationship is linear, the line contains the points

(10,350) and (8,500)

so, the equation of the line is

y-350 = -75(x-10)

so, when x=6,

y = -75(6-10)+350 = 650

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