Tanya is competing in a 3 mile race that starts at 10am. She hopes to run at an average rate of 6 miles per hour. At 10:15 am her mother arrives at the finish line and is told that Tanya is exactly halfway through the race. Define the independent and dependent variables. Write an equation that represents the total distance Tanya has run in terms of minutes from the time her mother arrives. How long will Tanya's mother have to wait at the finish line for Tanya to arrive? Assume Tanya continues to run at the same speed.