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Anestetic [448]
3 years ago
12

The function f(x) varies inversely with x and f(x)=-15 when x=30

Mathematics
1 answer:
meriva3 years ago
3 0
F(x) is the function that represents a given equation. It is defined more specifically by rules or conditions to satisfy the whole formula/equation.

In this case, f(x) has an inverse proportion with x (e.g. f(x) = 1/x). The second parameter says that f(x) = -15 when x is 30. Given that condition, just look for the formula, among the choices, that will result to -15 when x = 30. The answer is:

D. f(x) = -450/x

This is just -450/30 = -15
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