How do you find the average rate of change of #f(x) = 5x^2+2x-7# over the interval [5,7]?
1 Answer
Jun 4, 2017
Explanation:
#"the average rate of change of " f(x) " is"#
#(f(7)-f(5))/(7-5)larr(f(b)-f(a))/(b-a)to[a,b]=[5,7]#
#f(7)=5(7)^2+2(7)-7=252#
#f(5)=5(5)^2+2(5)-7=128#
#rArr"average rate of change "=(252-128)/(7-5)=62#
