For the direct variation y = 3 when x = -2, how do you find the constant of variation and find the value of y when x = 3? Algebra Graphs of Linear Equations and Functions Direct Variation 1 Answer Binayaka C. Aug 6, 2017 #y = -4.5# Explanation: # y prop x or y = k *x ; y=3 , x = -2 :. 3 = -2*k or# # k = -3/2 :. y = -3/2 *x ; k# is known as constant of variation. # x =3 , y = ? y = -3/2 *x :. y = -3/2 *3 =-9/2 = -4.5# #y = -4.5# [Ans] 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 3122 views around the world You can reuse this answer Creative Commons License