can somebody explain how to calculate instantaneous velocity using the formula ds/dt?

Question

I haven't learnt calculas yet

Answer 1

Instantaneous Velocity = the change in speed divided by the change in time. For example, If a runner posted these times:

d(s)= d(t)=
(in meters) (in seconds)
1.0 1.0
1.01 1.02 (et cetera) up to:
3.0 9.0


Find the runner's instantaneous velocity at t = 1.00 s. As a first estimate, find the average velocity for the total observed part of the run. We have,

V= ds/dt =(9m-1m)/ (3s-1s) = 4 m/s.

Answer 2

well with calculus it would be easy, but since you dont know it yet....cant you just do change in y over change in x? so if u have a graph just count from one point to another and how many y coordinates you moved and the same with the x.