I need to make a equation ​

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Ineed someone to me answer my question i have to have this done and knocked out