The Bus Schedule

Strategies and Hints

  1. For the buses travelling in the opposite direction, the slopes of the dotted lines must be negative. It takes t - 4 minutes for one of these buses to go the same distance the walker travels in 12 minutes.
  1. represents the speed of the buses going in the same direction to the speed of the walker.

    represents the speed of the buses going in the opposite direction to the speed of the walker.

Solution

Solving the equation for t results in t = 6. The buses leave the terminals every 6 minutes.