Question #68f7a

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Question #68f7a

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Answer 1 · 2017-08-27T10:10:33

$y = 143$ $y=143$

Explanation:

$the initial statement is y \propto x$ $"the initial statement is "ypropx$

$to convert to an equation multiply by k the constant$ $"to convert to an equation multiply by k the constant"$
$of variation$ $"of variation"$

$\Rightarrow y = k x$ $rArry=kx$

$to find k use the given condition$ $"to find k use the given condition"$

$y = 39 when x = 3$ $y=39" when "x=3$

$y = k x \Rightarrow k = \frac{y}{x} = \frac{39}{3} = 13$ $y=kxrArrk=y/x=39/3=13$

$"equation is " color(red)(bar(ul(|color(white)(2/2)color(black)(y=13x)color(white)(2/2)|)))$

$"when "x=11$

$y=13xx11=143$

Answer 2 · 2017-08-27T10:15:14

$y =143$

Explanation:

$y prop x or y = k*x or k = y/x ; y=39 , x =3 :. k =39/3=13$

$k$ is known as variation constant. Variation equation is

$y/x =13 ; x =11 , y = ? :. y/11 =13 or y = 13*11 = 143$

$y =143$ [Ans]

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Question #68f7a

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