PLEASE HELP ody is trying to get stronger and is working on building up the ability to do pushups. She starts off doing 5 pushups and each week increases the number she does by 4. Which of the following equations defines how many pushups will she do in the nth week? (Hint: Try your answer, check it to make sure it works!)
A. an = 4n – 1
B. an = 4n + 5
C. an = 4n + 9
D. an = 4n + 1