the equation 2x+5y=o is a direct variation. What is the constant of variation

Can you show work so i can understand?

Answers
re-arrange the equation so that y is in terms of x, subtracting 2x from both sides first gives: 5y = -2x
walterthewhale
15 November 2011
then divide by 5 giving: y = (-2/5)x or y equals, minus 2 fifths of x. so the constant of variation is -2/5 or if you are varying x in terms of y (you are probably not doing it this way round) it would be -5/2. Hope this helps, feel free to ask for clarification on any points
walterthewhale
15 November 2011
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