y varies directly with x -----> y = kx
plug in the given values of x and y and you can find k
Now you have the equation.
replace x with 22 and find y
Suppose that y varies directly with x, and y=10 when x=5. What direct variation equation relates x and y? What is the value of y when x=2?
A. y=2x; 4
B. y= 1/2x; 1
C. y=-2x; -4
D. y= 1/10x; 1/5
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