Ayard is equal in length to three feet the function f(y) takes a measurement in yards (as input) and returns a measurement in feet (as output) what number will the function return if the input is 15.4

The number which the function will return if the input is 15.4 is:

                                    46.2

We are given a conversion from yards to feet as:

              a yard is equal in length to three feet .

i.e. 1 yard= 3 feet

Also,  the function F(y) takes a measurement in yards (as input) and returns a measurement in feet (as output)

Now, if the input is: 15.4

i.e. we have the input as 15.4 yards

Now we have to find how  much is it in feet.

Since ,

1 yard= 3 feet

Hence,

15.4 yard= 15.4×3 feet

i.e.

15.4 yard= 46.2 feet.