Solve the Problem. -Crafty Bill's Cool Car Sales Opened as a Used Car

Multiple Choice

Solve the problem.
-Crafty Bill's Cool Car Sales opened as a used car sales lot in 1991. The graph shows the number of cars sold as a function of time. Is this the graph of a function? What is the domain?

A) Not a function; Domain: [2005, 2011]
B) Not a function; Domain: [2007, 2011]
C) Function; Domain: [2007, 2011]
D) Function; Domain: [2005, 2011]