HELP this is due in an hour

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.

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Find the value of x for which line a is parallel to line b