Question

a yard is equal in lenght to three feet. The function f(x) takes a measurement in yards (as input) and returns a measurement in feet (as output)​

Answer 1

The value of
`f(15.4)` is B. 46.2.

Explanation:

Step 1:

f(x) is dependent on the value of x.

So x is independent while f(x) is dependent on x i.e. the value of f(x) depends on the value of x.

Step 2:

`f(x)= 3x.`

So if we have the value of x we can calculate the value of f(x). Here the value of x is given as 15.4 so f(x) when x equals 15.4 can be calculated.

`f(x)= 3x, f(15.4) = 3(15.4),`

`3(15.4) = 46.2.`

So the value of f(15.4) is 46.2 which is option B.