Not sure how to approach, would like a step by step explanation or just how to set up problem

Which graph represents the solution of the inequality?

The green family is a family of six people. they have used 4,885.78 gallons of water so far this month. they cannot exceed 9,750.05 gallons per month during drought season. write an inequality to show how much water just one member of the family can use for the remainder of the month, assuming each family member uses the same amount of water every month.

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?