1. The problem is to evaluate the function $y = 3 \cdot 5^x$ for $x = 0$. 2. The formula given is $y = 3 \cdot 5^x$. Here, $5^x$ means 5 raised to the power of $x$. 3. Important rule: Any number raised to the power of 0 is 1, i.e., $a^0 = 1$ for any $a \neq 0$. 4. Substitute $x = 0$ into the function: $$y = 3 \cdot 5^0$$ 5. Simplify using the rule: $$y = 3 \cdot 1 = 3$$ 6. Therefore, the value of the function when $x = 0$ is $3$. Note: The user mentioned $y=1$ but based on the function and substitution, the correct evaluation is $y=3$.