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  • one year ago

Write an appropriate direct variation equation if y = 30 when x = -10. A. Y= -300x B. Y= 3x C. Y = -3x D. Y = 300x

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  1. phi
    • one year ago
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    direct variation means you can write the equation y = k x where k is some number. to find k, we need to know an x,y pair that is true for this equation luckily they tell us when x=-10 then y is 30 replace x with -10 and y with 30 and get 30 = k * -10 to find k, divide both sides by -10 can you do that ?

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