Final answer:
The correct ordered pair using the year as the x-coordinate and Wal-Mart's revenue in billions as the y-coordinate is (2015, 486).
Step-by-step explanation:
The question asks us to write the year 2015 and the revenue figure for Wal-Mart as an ordered pair, with the year as the x-coordinate and the revenue in billions as the y-coordinate. An ordered pair is a pair of numbers used to locate a point on a graph, where the first number is the x-coordinate and the second is the y-coordinate. In this case, the correct ordered pair that represents the year and revenue is (2015, 486).