Calculus AB Assignment Applications of the Derivative A. Find an equation that relates the total length of the elastic x to the distance y that the button has moved. B. You pull the button at a constant 3 cm/sec. Find the rate at which the length of the elastic is increasing when it is 12 cm long. 3. Below is the graph of the velocity of an object moving in the positive direction along the x-axis. Answer the following questions using only information from the graph. A. Find a time t when the object changes directions. If this never happens, say "This never happens. " Explain your