Solution-
Research question– “Study the relationship between the speed of cycling and the presence of people”
Hypothesis – Speed of cycle increases when fewer people are there, while as the people increases speed of cycle decreases.
Independent variable – number of people
Dependent variable- speed of the cycle
An Independent variable is something that is altered by the researcher and the variable on which the effect of an independent variable is observed is called the dependent variable. There is a cause-effect relationship.