Casey says that a function exists if the input is a student's gpa and the output is the student's name. is casey incorrect? why or why not?
a) casey is incorrect because students can have the same name.
b) casey is correct because more than one student can have the same gpa.
c) casey is incorrect because more than one student can have the same gpa.
d) casey is correct because it's unlikely that two students have the same gpa.

so !