When the x values are the same that is the distance when they will meet. The value of T when the distances are the same is the time they meet. However, for people teaching at the middle and high school levels this type of problem could be very beneficial. Children learn in many different ways. For those children who are struggling to understand the algebraic approach to solve this type of problem, the visual the calculator provides can be very helpful.
All students can use the graphing calculator as a way to check their work.
This type of problem will also allow students to become more familiar with the parametric mode of the calculator. Overall, this type of problem makes you aware of the numerous ways you can use a graphing calculator in solving equations.