Even though the rate of change is not always measured with respect to time, instantaneous rate of change is always measured with respect to time
False
Rate of change usually refers to instantaneous rate of change. Any type of rate of change(average or instantaneous) can be measured with respect to quantities/variables other than time. As you saw in the section of rate of change, it can be the rate at which the area of a circle changes with respect to its radius and many other things. So, the given statement is false