This video provides and example of how to determine a direct variation equation from given information and then determine y with a given value of xComplete. X and y are the two quantities - in our example theyd be the age and the height of the child. Y k x for some constant k called the constant of variation or constant of proportionality.
The equation y kx is an example of an algebraic equation that illustrates direct variation.
Direct variation problems are solved using the equation y kx. Use the information given in the problem to find the value of k. And the formula for direct variation is y kx where k represents the constant of variation. If b is directly proportional to a the equation is of the form b ka where k is a constant.