To solve the expression \(-3^0 + 4.5\), we use the fact that any non-zero number raised to the power of 0 is 1. The negative sign in front does not apply to the base when calculating the exponent, so we have:
\[ -3^0 = -1 \cdot 3^0 = -1 \cdot 1 = -1 \]
Now we can complete the expression:
\[ -3^0 + 4.5 = -1 + 4.5 = 3.5 \]
Thus, the correct process is shown in the first option:
\(-3^0 + 4.5 = -1 \cdot 3^0 + 4.5 = -1 \cdot 1 + 4.5 = -1 + 4.5 = 3.5\)