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A certain elephant calf weighed $226\text{ pounds}$ when it was born. The elephant calf gained an average of $3\text{ pounds}$ per day in its first year of life. Which equation models this situation, where $y$ is the estimated weight of the elephant calf, in pounds, $x\text{ days}$ after it was born?

A

$y=226+3x$

B

$y=226-3x$

C

$y=3+226x$

D

$y=3-226x$