Robert Hooke was a famous scientist who experimented with springs
(metal coils). He found that the farther you stretched the spring, the larger
the force with which the spring pulled back on you.
What was the independent variable in Hooke's experiment?
O A) the material the spring was made of
OB) the force of the spring pulling on you
OC) the distance the spring was stretched
OD) the number of coils of metal in the spring