7. the value of y varies directly with x, and y = -3 when x = 1. find y when x = -6.
8. the value of y varies directly with x, and y = 6 when x = 18. find y when x = 12.
9. cameron earns $5 per hour at her after-school job. the total amount of
her paycheck varies directly with the amount of time she works. write a direct
variation equation for the amount of money y that she earns for working x hours.
then graph.