A cash card has a starting value of $25. If the card is not used within the first year of its purchase, the value on the card begins to decrease by $2.50 per month.

The relationship between the number of months after the first year and the amount remaining on the card is continuous or discrete
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The independent variable is the amount remaining on the card or number of months after the first year
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The dependent variable is the amount remaining on the card or number of months after the first year
.

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