The temperature of boiling water decreases as it is removed from a hot stove according to the equation T=-71m+212, where [T] is the temperature of the water and [m] is the number of minutes since the water was taken off the stove. What is the rate of change in this problem?

temperature goes down 71 LaTeX: ^\circ per second

temperature goes down 71LaTeX: ^\circ per hour

temperature goes down 71LaTeX: ^\circ per minute

temperature goes up 71LaTeX: ^\circ per minute