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given that y varies directly with x, and y=12,when x=9,find y when x=7

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MISSJINDYSUMMERIN

Direct Variation

Given that y varies directly with x, and y = 12, when x = 9, find y when x = 7.

[tex]\underline{\mathcal{INFO:}}[/tex]

  • Direct variation: y = kx

[tex]\boxed{\tt{Solution:}}[/tex]

  • y = 12, x = 9
  • y = kx
  • 12 = 9k
  • 12/9 = k

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  • y = ?, x = 7, k = 12/9
  • y = kx
  • y = (7)(12/9)
  • y = 28/3

[tex]\huge\boxed{\tt{ANSWER:}}[/tex]

  • The value of y is 28/3.

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