Which relation is NOT a function?

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

The winner of a golf tournament made five putts for birdies. the lengths of these putts are in the table shown. what is the total distance of the putts in the yards, feet, and inches?

Write the equation of the circle centered at (10,-2) with radius 2