Final answer:
The table represents a proportional relationship because the ratios for each input and output are equivalent.
Step-by-step explanation:
The table represents a proportional relationship because the ratios for each input and output are equivalent. To determine if a table represents a proportional relationship, we need to check if the ratios of the entries in the two columns are the same. In this table, if we divide the number of walls by the amount of paint, we get the same ratio for each row. For example, when there is 1 wall, we need 4 gallons of paint. When there are 1.5 walls, we need 6 gallons of paint, which is double the amount of paint required for 1 wall. This pattern continues for each row, demonstrating a proportional relationship.