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Math·Algebra·Linear equations in two variables

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The length, $y$, of a beluga whale was $160$ centimeters (cm) when it was born and increased an average of $4.7\text{ cm}$ per month for the first $12$ months after it was born. Which equation best represents this situation, where $x$ is the number of months after the whale was born?

A

$y=4.7x+160$

B

$y=160x$

C

$y=4.7x+4.7$

D

$y=160x+160$