Q. Given the function f(x)=−x2+3x+6, determine the average rate of change of the function over the interval −1≤x≤5.Answer:
Identify Rate of Change Formula: Identify the average rate of change formula, which is (f(b)−f(a))/(b−a), where a and b are the endpoints of the interval.
Calculate f(−1): Calculate the value of f(−1) by substituting x=−1 into the function f(x)=−x2+3x+6. f(−1)=−(−1)2+3(−1)+6 f(−1)=−1−3+6 f(−1)=2
Calculate f(5): Calculate the value of f(5) by substituting x=5 into the function f(x)=−x2+3x+6. f(5)=−(5)2+3(5)+6 f(5)=−25+15+6 f(5)=−4
Calculate Average Rate of Change: Use the values of f(−1) and f(5) to calculate the average rate of change over the interval [−1,5].Average rate of change = 5−(−1)f(5)−f(−1)Average rate of change = 5−(−1)(−4−2)Average rate of change = 6−6Average rate of change = −1