In this case it's the change in the vertical variable (force) divided by the change in the horizontal unit (acceleration). The force is measured in units of Newtons where 1 N = 1 kg*m/s 2.

Graph Plot a graph of mass in g on the y-axis against volume in cm 3 on the x-axis. Draw a line of best fit through the points. The gradient of the graph = m a s s v o l u m e = density ...

The relationship between force and acceleration with Dr Maggie Aderin-Pocock and Dr Alex Lathbridge.

The Connecting Formula: Newton's Second Law The relationship between mass and force is expressed in Newton's second law of motion: Force (N) = Mass (kg) x Acceleration (m/s²) ...