A plane is starting a descent to prepare for landing. The plane's initial altitude was 25,500 feet. The table below shows the altitude (y) of the plane after each minute (x) of the descent. Minutes (x) Altitude (y) 1 24,525 2 23,550 3 22,575 4 21,600 After descending for 4 minutes, the pilot was contacted by an air traffic controller. The controller asked how long it would take the plane to descend to an altitude of 15,750 feet at the current rate of descent. How many minutes should the pilot tell the air traffic controller that it's going to take? A. 5 minutes B. 7 minutes C. 4 minutes D. 6 minutes

How to do this , and can some one explain

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?