The Figure Shows the Terminal Speed, in Meters Per Second

Multiple Choice

The figure shows the terminal speed, in meters per second, of a raindrop as a function of the size of the drop measured in terms of its diameter. Estimate the slope of secant line connecting the points for diameters of 1 mm and 5 mm.

A) 1.275 m/s per mm
B) 2.217 m/s per mm
C) 3.325 m/s per mm
D) 5 m/s per mm
E) 4 m/s per mm