In the graph at right, points A, B, and C represent three different students.   

1. Which student is oldest? Explain how you decided.

   Hint (a):

   For this question, height does not matter.

   Answer (a):

   C has the largest $x$-value (age).

2. What can you say about student B compared to students A and C? Tell as much as you can and justify your statements.

   Answer (b):

   B is shorter and older than A, but younger and the same height as C.