Renata wins a $20 gift card to an online music site. After Renata purchases 16 songs, the gift card has a remaining balance of $0. Which equation represents the relationship between y, the remaining balance on Renata’s gift card, and x, the number of songs purchased?


mile(s) per minute

What is an equation of the line that represents n, the number of mile marker passed, as a function of t, time in minutes?