Independent Practice; Problem Solving help please!

With #! i’ve tried to figure it out but i can’t.

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?

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.