document.write( "Question 1034810: Write the function that models the variation.
\n" ); document.write( "Find 𝑧 when 𝑥 = 4 and 𝑦 = 9. 𝑧 varies directly with 𝑥 and inversely with 𝑦.
\n" ); document.write( "When 𝑥 = 6 and 𝑦 = 2, 𝑧 = 15 \n" ); document.write( "

Algebra.Com's Answer #649485 by fractalier(6550) $\"\"$ $\"About$

You can put this solution on YOUR website!
We write this as
\n" ); document.write( " $\"z+=+kx%2Fy\"$
\n" ); document.write( "Plugging in we get
\n" ); document.write( " $\"15+=+6k%2F2\"$
\n" ); document.write( "so that
\n" ); document.write( "k = 5
\n" ); document.write( "and then
\n" ); document.write( " $\"z+=+5x%2Fy\"$
\n" ); document.write( "Now to find the new z...
\n" ); document.write( " $\"z+=+5%284%29%2F9+=+20%2F9\"$ \n" ); document.write( "

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