Answer:
Dependent; speed estimate
Step-by-step explanation:
An experiment is a research carried out on some objects, using variables to arrive at a finding or conclusion.
Dependent variable entails the variable in an experiment is that variable that talks about what the experiment wants to achieve.
Told to find out the speed estimate of a car, the experiment is spelt out very clearly on what it wants to achieve and right inside the centre of the experiment lie the dependent variable.