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A yard is equal in length to three feet. The function [tex]f(x)[/tex] takes a measurement in yards (as input) and returns a measurement in feet (as output).

[tex]f(x) = 3x[/tex]

Input: [tex]\longrightarrow[/tex] Output
Yards [tex]\quad[/tex] Feet

[tex]\[

\begin{array}{ccc}

1 & \longrightarrow & f(1) = 3 \\

2 & \longrightarrow & f(2) = 6 \\

12.2 & \longrightarrow & f(12.2) = ?

\end{array}

\][/tex]

What number will the function return if the input is [tex]12.2[/tex]?

A. 15.2
B. 36.2
C. 14.2
D. 36.6

Answer :

To find the value that the function [tex]$f(x) = 3x$[/tex] returns when the input is [tex]$12.2$[/tex], let's go through the process step-by-step:

1. Identify the Function: The function given is [tex]$f(x) = 3x$[/tex]. This means for any input [tex]$x$[/tex], the function will multiply [tex]$x$[/tex] by 3.

2. Substitute the Input Value: The input value we are working with is [tex]$12.2$[/tex] yards. So, we substitute [tex]$12.2$[/tex] for [tex]$x$[/tex] in the function:

[tex]\[
f(12.2) = 3 \times 12.2
\][/tex]

3. Calculate the Result: Perform the multiplication to find the output in feet.

4. Determine the Output: When you multiply [tex]$3 \times 12.2$[/tex], you will get approximately [tex]$36.6$[/tex].

Therefore, the function [tex]$f(x)$[/tex] returns [tex]$36.6$[/tex] feet when the input is [tex]$12.2$[/tex] yards. The correct answer is:

D. 36.6

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