Hi,

Annual profit in thousands of dollars is given by the function, 

P(x) = 12x - 100, 

where x is the number of items sold in thousands, x ≥ 10.

1.describe the meaning of the number 12 in the formula

   As x increases by one, P(x) increases by 12

 (that is: for every 1000 items sold, profit increases by $12,000) 

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