A submarine is descending at a rate of 7 feet per second. A 2-column table with 4 rows. Column 1 is labeled Seconds with entries 1, 2, 3, 4. Column 2 is labeled Feet with entries 7, 14, 21, 28.

Which statements are true? Select all that apply.
The number of seconds causes a change in the number of feet the sub descends.
The number of feet the sub descends causes a change in the number of seconds.
The equation is f = 7s.
The equation is s = 7f.
As the number of seconds increases, the number of feet the sub descends increases.