Question

Yohanna is conditioning all summer to prepare for her high school's varsity soccer team tryouts. She is incorporating walking planks into her daily plan. Every day, she will complete 4 more walking planks than the day before. Yohanna starts with five walking planks on the first day. Write an explicit formula that can be used to find the number of walking planks she completes on any given day.

Answer 1

Explanation:

The number of walking planks is given by the series

5, 9, 13, ...,  

This is an arithmetic series with

a = 5, the first term

d = 4, the common difference

Answer: (see picture below)