Using only the wave equation and the variables it contains, explain three ways the equation could be manipulated to result in a decrease in speed. Can someone please help me?

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)