The function A = s^2 giving the area of a square as a function of its side length
Linear or Nonlinear:
Domain:
Increasing or Decreasing:
The function A = s^2 is nonlinear.
The domain of the function is all real numbers, as the side length of a square can be any positive real number.
The function is increasing, as increasing the side length of the square will result in a larger area.