Does this equation represent a function? Why or why not?

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.

One positive integer is 2 less than another. the product of the two integers is 24. what are the integers