Mei Mei was given a gift card for a coffee shop. Each morning, Mei Mei uses the card to buy one cup of coffee. The original amount of money on the gift card was $15 and each cup of coffee costs $3. Make a table of values and then write an equation for A, in terms of x, representing the amount money remaining on the card after buying x cups of coffee.
Number of Cups of Coffee
0
1
2
3
Amount of Money Remaining on Card
15
12
9
6