document.write( "Question 567928: the value of y varies with x and y=12 when x=-6 find y when x=-4 \n" ); document.write( "

Algebra.Com's Answer #366806 by Horlaye(27) $\"\"$ $\"About$

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Y varies as x
\n" ); document.write( " y=kx ( where k is the constant )
\n" ); document.write( " then we subtitute for the values of y and x to know the value of our constant.
\n" ); document.write( " 12=-6k, divide both sides by the co-efficient of k
\n" ); document.write( " therefore k=-2
\n" ); document.write( " (y=-2x) :the law of variation.
\n" ); document.write( " Hence find y when x=-4
\n" ); document.write( " y=-2x
\n" ); document.write( " y=-2(-4)
\n" ); document.write( " y=8
\n" ); document.write( " \n" ); document.write( "

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