Alyssa, Bradley, Carl, and Dionne each made a statement about the relation {(1,2), (3,4), (5,6),(100,101)}. Which student's statement is completely true? Alyssa said "It is not a function because there are not enough values in the domain."

Bradley said "It is a function: y=x+1 for all x in the domain."

Carl said "It is not a function because the values in the domain are not interchangeable with those in the range."

Dionne said "It is a function: y=x2+1 for all x in the domain."