What is the lowest common mutiple of 6 and 9

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3

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?

Can someone me and explain..will award brainlest!