More on a =F/m

Plotting the graphs:
as for the horizontal axis where the quantity is 1/mass just do it the normal way you would for any quantity. You should start the scale at zero and it goes to about 2 (1/kg). Place the values where they belong on this scale . For example if a data point has a 1/mass = .67 it goes one third of the way from the origin to the 2 (1/kg) mark ( 2/3 is 1/3 of the way from 0 to 2).

We want a straight diagonal line increasing upward from left to right.