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Math·Algebra·Linear functions

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The function $w$ models the weight, in ounces, of the remaining solid wax of a burning candle as a function of the time $x$, in hours, after the candle was lit. The graph of $y=w(x)$ is shown. According to the model, what was the weight, in ounces, of the candle’s remaining solid wax $4$ hours after the candle was lit?

A

$4$

B

$8$

C

$10$

D

$13$