Can you show the equation used ? I’m stuck lol

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.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?