Explain how to identify intervals on which a function increases, decreases, or is constant.
If you are taking Calculus,
find dy/dx
if dy/dx > 0 function increases
if dy/dx <0 function decreases
if dy/dx = 0 function is constant
find dy/dx
if dy/dx > 0 function increases
if dy/dx <0 function decreases
if dy/dx = 0 function is constant