Answer:
Explanation:
In order to find the equation for number of games sold for any month, we have to make the following assumptions:
Let y be the number of days in a month, which can vary for different months.
Let x be the fixed number of games sold on a particular day.
Then,


Example:
For the month of February, 5 games were sold everyday. Then, number of games sold in February

Thus, 140 games were sold in February.