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Math·Algebra·Linear functions

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A linear function $f$ gives a company’s profit, in dollars, for selling $x$ items. The company’s profit is $190 when it sells 4 items, and its profit is $670 when it sells 10 items. Which equation defines $f$?

A

$f(x)=180x-670$

B

$f(x)=67x$

C

$f(x)=80x-10x$

D

$f(x)=80x-130$