Jennette904 Jennette904

21-04-2015
Mathematics

contestada

Variable y varies directly with variable x, and y = 9 when x = 5.

What is the constant of variation in decimal form?

Respuesta :

21-04-2015

Direct variation:

[tex]\sf~y=kx[/tex]

Plug in what we know:

[tex]\sf~9=k(5)[/tex]

[tex]\sf~9=5k[/tex]

Divide 5 to both sides:

[tex]\sf~k=\boxed{\sf1.8}[/tex]

So the constant of variation is 1.8.

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