If y varies directly with x, if y=-9 when x= 3, how do you find y when x=-5? Algebra Graphs of Linear Equations and Functions Direct Variation 1 Answer Konstantinos Michailidis Feb 26, 2016 It is y=15 Explanation: It should be -9/3=y/-5=>3y=45=>y=45/3=15 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=-\frac{1}{6}x? 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 10247 views around the world You can reuse this answer Creative Commons License