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Yes, independant variables are the variables that are changed in an experiment to observe the results, called the dependant variable.
The independant variable is the variable being manipulated or changed. The dependant variable is the results. For example, seeing how different amounts of steroids affect someones body weight. The independant would be the steroids because you are changing the amount. The dependant is the body weight because those are the results you are getting back.
the three (3) types of variables are: - controlled - manipulated - responding.
A scatter plot plots two variables against each other, allowing the 'researcher' to easily see if there is a correlation between the dependant variable and the independant variable with relation to their data set.
Take the expression y = f(x) where f is a function relating y in terms of x. x is the input - the independant variable. y is the output - the dependant variable because it's value depends on x.