document.write( "Question 135634: w is directly proportional to z. If w = -6 when z =2,find w when z =-3 \n" ); document.write( "
Algebra.Com's Answer #99364 by solver91311(24713)\"\" \"About 
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Two quantities y and x are said to be in direct proportion if y is given by a constant multiple of x, i.e. \"y=cx\" where c is a constant.\r
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\n" ); document.write( "\n" ); document.write( "So, for your problem \"w=cz\".\r
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\n" ); document.write( "\n" ); document.write( "You are given that \"w=-6\" when \"z=2\", so \"-6=2c\", or \"c=%28-6%29%2F2=-3\"\r
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\n" ); document.write( "\n" ); document.write( "Now you can write: \"w=-3z\"\r
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\n" ); document.write( "\n" ); document.write( "w for \"z=-3\" is now a simple matter of substitution and arithmetic.
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