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  • 21-01-2017
  • Mathematics
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y varies directly with x, and y = 15 when x = 3. What is the value of x when y = 4?

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erika18marie
erika18marie erika18marie
  • 21-01-2017
Y varies directly with x means that the equation would be y=kx. 
15=k3 
k=5
So, 4=5x for when y=4
Divide both sides by 5 to get 4/5 = x
Therefore, the value of x is 4/5
Hope this helped! xx
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