Which of the following lists of ordered pairs is a function?

OPTION D.

Step-by-step explanation:

1. A relation is a function if for each value of x there is only one value of y.

2. You can look for in the options the ordered pairs that has only one value of y for each value of x.

3. For example:

A. (3,-2), (2,-1), (3,4), (4,7)

x=3 has two values of y:  (3,-2) and  (3,4); therefore, it is not a function.

4. For the option B, the value x=4 has two values of y, therefore, it is not a function.

5. For the option C, the value x=1 has two values of y, therefore, it is not a function.

Then, the answer is the option D.

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation: