Mashaal Masha
The graph shows the relationship between the number of shares of stock from Company A, $x$, and the number of shares of stock from Company B, $y$, that Simone can purchase. Which equation could represent this relationship? 

 

Difficulty: Medium
A: 

$y=8x+12$

B: 

$8x+12y=480$

C: 

$y=12x+8$

D: 

$12x+8y=480$

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