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A direct variation function contains the points (-9,-3) and (-12,-4). Which equation represents a function?
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A direct variation function contains the points (-9,-3) and (-12,-4). Which equation represents a function?

User Scubabuddha
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1 Answer

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k = (y2 - y1)/(x2 - x1)

k = ( - 4 - ( - 3))/( - 12 - ( - 9))

k = - (1)/(21)

direct \: variation \: equation \: is


y \: or \: k = - (1)/(21) x
User Hzpz
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