Plz help asap test due sooon

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.

Extra points! find the missing dimension! need asap

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?