A student starts with a certain amount of money on a prepaid debit card. The equation below models the approximate balance, , in dollars, remaining on the card after purchases.
The graph of this equation in the -plane is a line. What is the best interpretation of the -intercept in this context?
The student makes 15 purchases per day.
The card balance decreases by $15 for each purchase.
The card will have no money left after about 16.67 purchases.
The student started with $250 on the debit card.
