If y=1/4 when x=5, find y when x=7, given that y directly with x

How do i do this activity, is appreciated

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16