Final answer:
The number of yellow M&Ms in a package is represented by the variable y. The correct answer to the question is option 2, which states the number of yellow M&Ms is y.
Step-by-step explanation:
The question asks about the number of yellow M&Ms in a package, represented by the variable y. The correct answer to the number of yellow M&Ms in the package would be option 2, represented by the variable y. Without additional information, options 1 (Cannot be determined), 3 (m), and 4 (ms) cannot be correct because they do not correctly identify the number of yellow M&Ms as the question defined the variable y as representing the number of yellow M&Ms.
Therefore, when faced with a similar problem, it's essential to pay attention to the variables and what they represent as defined in the question. In this case, the variable y specifically stands for the number of yellow M&Ms and therefore, the answer is correctly given by option 2).