1. **State the problem:** Evaluate the function $f(x) = 0.3x$ at $x = 1.5$. 2. **Formula:** The function is given by $f(x) = 0.3x$. To find the value at a specific $x$, substitute $x$ into the function. 3. **Calculation:** $$f(1.5) = 0.3 \times 1.5$$ $$= 0.45$$ 4. **Explanation:** Multiplying 0.3 by 1.5 gives 0.45, so the function value at $x=1.5$ is 0.45. This completes the evaluation of the first function at the given $x$ value.