Identify ALL relations that are functions. You may select more than 1 ansdwer.
You may wish to draw a mapping diagram or create a table for each to help you.
A. {(6,1),(-7,1),(6,-7),(-9,6)}
B. {(-5,-1),(3,-10),(-1,7),(9,6)}
C. {(6,8),(4,9),(-5,7),(-6,-8)}
D. {(7,10),(-5,1),(-2,1),(7,-6)}