4x Find the average rate of change between t=1 and t=2 A 16feet/second B 8feet/second C -8feet/second

To find the average rate of change of a function between two points, we need to calculate the difference in the function values at those points and divide it by the difference in the independent variable values.In this case, we are given the function and we need to find the average rate of change between and .The function value at is .The function value at is .The difference in the function values is .The difference in the independent variable values is .Therefore, the average rate of change between and is .So, the correct answer is B) .