How do you determine the constant of variation for the direct variation given (0, 0), (3, 12), (9, 36)? Algebra Graphs of Linear Equations and Functions Direct Variation 1 Answer Konstantinos Michailidis Oct 2, 2015 See explanation Explanation: It is k=12−03−0=4 hence the constant of variation is 4 Answer link Related questions What is Direct Variation? What does direct variation look like on a graph? What are examples of direct variation? How do you determine if a function is a direct variation when given a table? How do you write direct variation equations? What is the constant of proportionality "k"? Why is y=2x−1 not a direct variation? How do you graph the direct variation equation y=−16x? What is the direct variation equation if y varies directly with x, and y=7.5 when x=2.5? What is the direct variation equation if y varies directly with x, and y=2 when x=4? See all questions in Direct Variation Impact of this question 4906 views around the world You can reuse this answer Creative Commons License