The instantaneous rate of change of f(x) = 6x2 - 9 at any x is f`(x) = 12x. This is a straight line. Its average value between x=2 and x=b is (12b + 12*2)/2 → 6b+12
The instantaneous rate of change of f(x) = 6x2 - 9 at any x is f`(x) = 12x. This is a straight line. Its average value between x=2 and x=b is (12b + 12*2)/2 → 6b+12
