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Find the constant of variation. y varies directly with x and y=72 when x=6. 10 11 -11 12 In this graph, k is what? undefined negative zero positive Is this graph a direct variation graph? yes or noIs this graph a direct variation graph? yes or no Which of these is NOT required for a graph to be a direct variation graph? go through origin k (or slope) cannot be 0 linear positive slope Find the constant of variation. y varies directly with x and y=55 when x=11. 5 -5 44 66 What is the equation of this graph? y=-½x y=½x y=-2x y=2x What is the equation of this graph? y=3x y=⅓x y=-3x y=-⅓x y varies directly with x. Write an equation that relates x and y if y=32 and x=8. 32=x y=4x y=8x y=32x y varies directly with x. Write an equation that relates x and y if y=56 and x=8. y=7x x=7y y=8x 8y=x |