Write and graph an equation to represent the situation: You have a $30 gift card that will allow you to purchase 5 albums.
(I thought it would be 5x=30, x=6, but the answer is y=1/6x...)

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- anonymous

5x = 30 is the equation for if you were solving how many albums can be purchased with $30 and only $30
\(y=\frac{ 1 }{ 6 }x\) tells how many albums you can buy for every amount of money within your domain

- anonymous

Thank you!! How do I go from the original situation to the answer, though?

- anonymous

you need two variables, y and x, because both the amount of money and the amount of albums purchased can vary.
It looks like they let x be the amount of money and y be the number of albums that can be bought. The slope is 1/6.
\[slope=\frac{ rise }{ run }=\frac{ \Delta y }{ \Delta x }=\frac{ 5~albums }{ 30~dollars }=\frac{ 1 }{ 6 }~albums~per~dollar\]

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- anonymous

Thank you very much!! =)

- anonymous

you're welcome

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