The volume of a right octagonal prism is 30 cubic feet. the area of the octagonal base is 8 square feet. what is the height of the prism

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?