(2) Which of the following sets of ordered pairs represents a function? (A) \( (2,3),(6,9),(10,12),(2,-3) \) (B) \( (-9,4),(-2,10),(-2,12),(0,6) \) (C) \( (1,2),(4,9),(10,22),(15,7) \) (D) \( (0,1),(0,2),(0,3),(0,4) \)

Step 1 ：Check for unique x-values in each set:

Step 2 ：A: Repeated x-value 2

Step 3 ：B: Repeated x-value -2

Step 4 ：C: Unique x-values

Step 5 ：D: Repeated x-value 0