1. The problem asks to confirm or analyze the function expression where the results correspond to the function $4x$. 2. The function given is $f(x) = 4x$. This means for any input value $x$, the output is obtained by multiplying $x$ by 4. 3. To understand this function better, consider some example inputs: - If $x=0$, then $f(0) = 4 \times 0 = 0$ - If $x=1$, then $f(1) = 4 \times 1 = 4$ - If $x=a$, then $f(a) = 4a$ 4. The function $4x$ is a linear function with slope 4 and intercept 0. This means the graph is a straight line passing through the origin with a steepness determined by the slope 4. 5. In simple terms, the function scales the input value by 4 to produce the output. Final answer: The function is $f(x) = 4x$.