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pychu [463]
2 years ago
5

If x and y vary inversely, and x = 8 when y = 1/4, what is y when x = -4?

Mathematics
1 answer:
Alinara [238K]2 years ago
3 0

y \propto \dfrac 1x\\\\\implies y = \dfrac kx \\\\\implies \dfrac 14  = \dfrac k{8}\\\\\implies k=2\\\\\text{When}~ x =-4\\\\y = \dfrac{k}{x} = \dfrac{2}{-4}= -\dfrac 12

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