2 years ago

suppose x and y vary inversely and y=10 when x=4. write a function that models the variation then find y when x =90

1 answer:

4 0

X = k/y
4 = k/10
k = 4 x 10 = 40
Thus, x = 40 / y

90 = 40 / y
y = 40/90 = 4/9

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