document.write( "Question 370074: for the data in the table tell whether y varies directly with x if it does write an equation for the direct variation\r
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Algebra.Com's Answer #263726 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "*Note: when x = 0, then y = 0
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document.write( "Letting k represent the constant to see if y varies directly with x:
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document.write( "y = k*x  
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document.write( "using Pt (1,(-5/2)) to solve for k
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document.write( "(-5/2) = k*1
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document.write( "(-5/2) = k
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document.write( "checking k against the remaining data
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document.write( "-5 = (-5/2)*2
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document.write( "-7.5 = -7 1/2 = (-15/2)= (-5/2)*3
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document.write( "y = (-5/2)x      is the equation for this direct variation \n" );
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