Let us assume that a body is to travel from point A to point E, with B, C, D being intermediate points. The points between A and E are equally spaced apart by a distance of 10 km. The body is SUPPOSED to travel AB, BC, CD, DE with speeds of 10 kmph, 20 kmph, 30 kmph, 40 kmph respectively. With the data given above, let us suppose that the body begins its journey from A. Please note that the instantaneous speed of the body is available. Once the body covers AB, we can compute the actual average speed. Let us suppose that the body actually travels AB with an average speed of 8 kmph. So, the fact is that the body is SUPPOSED to cover AB with an average speed of 10 kmph but actually performed its journey with average speed of 8 kmph. Now the body being traversed AB, is supposed to traverse BC. At this point can we PREDICT by how much difference in average speeds (SUPPOSED ~ ACTUAL) the body can cover BC? To put it simply, is there a way we can take the history (difference in average speeds of AB) into account in predicting the future (difference in average speeds of BC, CD and DE)? Please assume that the reasons for the difference in actual and Supposed speeds are completely arbitary.