document.write( "Question 142245: The variables x and y vary inversely. When x is 10 and y is 7. \r
\n" ); document.write( "\n" ); document.write( " If x is 5, then y is ___ ?\r
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\n" ); document.write( "\n" ); document.write( "I do not understand how to set this up? \n" ); document.write( "

Algebra.Com's Answer #103549 by MathLover1(20850) $\"\"$ $\"About$

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Use the model for inverse variation.\r
\n" ); document.write( "\n" ); document.write( "The model for direct variation is:
\n" ); document.write( " $\"y+=+k%2Fx\"$ \r
\n" ); document.write( "\n" ); document.write( "Substitute $\"10\"$ for $\"x\"$ and $\"7\"$ for $\"y\"$ :
\n" ); document.write( " $\"7+=+k%2F10\"$
\n" ); document.write( " $\"7%2A10+=+k\"$ Е..\r
\n" ); document.write( "\n" ); document.write( " $\"k=70\"$ ЕЕ.\r
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\n" ); document.write( "\n" ); document.write( "The inverse variation equation that relates $\"x+\"$ and $\"y\"$ is:\r
\n" ); document.write( "\n" ); document.write( " $\"y+=+70%2Fx\"$ .........substitute $\"x\"$ for $\"5\"$
\n" ); document.write( " $\"y+=+%2870%2F5%29\"$
\n" ); document.write( " $\"y+=+14+\"$ \r
\n" ); document.write( "\n" ); document.write( "If $\"x\"$ is $\"5\"$ , then $\"y\"$ is $\"14\"$ .
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