Write an equation that you could use to calculate Jackie's wait time based on the information given. Jackie works for a small company that sells books online and is responsible for mailing out the books to customers. Every morning she gets in line at the local post office and estimates the length of her wait. The length of her wait depends on the number of people in line ahead of her, and it averages about 2 minutes per person in line.

w = the length of time Jackie will need to wait

p = the number of people in line ahead of Jackie