Question 937596
Not much to use, but you can start with a linear model and take points as (time, speed) using any variables you wish, but I choose,  (t, v).


Your two points are  (2,64) and (4,58).  Find the line with those two points for ordered pair of the form  (t, v).


If you already learned that kind of exercise then you know what to do, otherwise say help is needed for that process.