Which of the following relations is a function? a. { (2, 6), (3, 9), (4, 2), (3, 6) } b. { (2, 8), (3, 6), (2, 4), (0, 2) } c. { (3, -2), (4, 7), (-2, 5), (-4, 5) } d. { (4, 7), (-2, 5), (1, 3), (-2, 1) }

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?