Did you mean "variables and constant"?
Variables vary taking on various values whereas constants do not change and remain fixed.
Temperature, number of accidents per day in a city, number of children born in a city are examples of variables. Number of planets in our solar system is an example of a constant.
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Direct proportionality.
A function is a relation where one variable specifies a single value of another variable. Presenting relation and function can be done different ways including verbal, numerical, algebraic, and graphical.
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.
walang relation
in general regression model the dependent variable is continuous and independent variable is discrete type. in genral regression model the variables are linearly related. in logistic regression model the response varaible must be categorical type. the relation ship between the response and explonatory variables is non-linear.