Question

Briana has been saving money in her piggy bank for a long time. Her mother convinces her to open a savings account at the bank. Briana opens the account and then deposits her allowance into the account at the end of every week. Using the table below, determine how much money Briana initially deposited into the account when she opened it.

x
y
Week
Money in Account ($)
1
247
2
262
3
277
4
292