The function varies directly with x and when x = 30. f(x) f(x) = 90 What is when x = 6? f(x)
Mathematics · Middle School · Tue Nov 03 2020
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Given the statement:
The function varies directly with x and when x = 30. f(x) = 90
Determine what is f(x) when x = 6.
Solution:
The given functions is a proportion wheres x is 3 times the value of f(x), this can be seen since when x = 30, f(x) = 90. Hence we can solve f(x) when x = 6.
f(x) = 3x
x = 6
f(6) = 3(6)
f(6) = 18
Final answer:
f(6) = 18