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Math·Algebra·Linear equations in two variables

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In the relationship between variables $x$ and $y$, each increase of $1$ in the value of $x$ decreases the value of $y$ by $3$. When $x=0$, $y=2$. Which equation represents this relationship?

A

$y=-\frac{1}{3}x+2$

B

$y=-\frac{1}{3}x-2$

C

$y=-3x+2$

D

$y=-3x-2$