From the present question, we know that Caitlin saved $ 120 from the summer job, and is depositing weekly $5 in her account. It means that:
after 1 week, it will be $120 + $5 = $125
after 2 weeks, $125 + $5 = $130
after 3 weeks, $130 + $5 = $135
4 weeks, $135 + $5 = $140
We can use this data to complete the table as follows:
From this, we can conclude that her account balance is proportional to the number of weeks of deposit because this is increasing with time.
