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the value of x varies directly with the value of y and when x=3 y= -9 write an equation to represent the direct variation.​

the value of x varies directly with the value of y and when x=3 y= -9 write an equation-example-1
User Kbariotis
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1 Answer

3 votes

Answer:

y = - 3x

Explanation:

Given that x varies directly as y then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = - 9 when x = 3

k =
(y)/(x) =
(-9)/(3) = - 3

y = - 3x ← equation of variation

User Tehnix
by
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