The area of a rectangle with width x and length 7x is 7x^2 what does the coefficient 7 mean in terms of the problem

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?