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douglas12
Determine whether y varies directly with x. If so, find the constant of variation k and write the equation. x: 7 13 19 25 y: 11.2 20.8 30.4 40 A. yes; k = 1.6; y = 1.6x B. yes; k = 6; y = 6x C. yes; k = 7; y = 7x D. no
Divide each value of y by the corresponding value of x. If the answer is the same each time, y varies directly with x and the quotient is the variation constant k.
y varies directly with x
No, I believe thats the equation for inversely proportional.
my bad yeah youre right
For directly proportional, y=kx
sorry im trying to lead him to the answer not list it
Yep, the y values are 1.6 times the x values, so the answer is A.
If the quotient for each y/x =1.6, then it is direct variation with k =1.6