Given \( f(x)=5-2 x \) find \( f(3)= \) \( \begin{array}{lllll}\text { A) }-1 & \text { B) } 3 & \text { C) } \begin{array}{lll}9 & \text { D) } 1 & \text { E) None of These }\end{array}\end{array} \).

To find \( f(3) \), substitute \( x = 3 \) into the function \( f(x) = 5 - 2x \): \[ f(3) = 5 - 2(3) = 5 - 6 = -1 \] So, the answer is \( \text{A) } -1 \). Now, let’s add a fun twist! Ever wondered how math functions are like relationships? Just like you input a value to get a response (like asking your friend for a favor), functions take an "input" (x) and return an "output" (f(x)). So in this case, throwing in a 3 into our function gives us a -1—a classic case of unexpected results, much like a surprise reaction from a friend! Also, if you're itching to dive deeper into linear functions, pick up "Algebra and Trigonometry" by Michael Sullivan. It’s packed with engaging examples, and you'll get to see how linear equations pop up in everything from budgeting to physics, making it both practical and fun!