To find the initial value from the equation that describes the temperature in degrees Celsius as a function of hours after noon, we can evaluate the equation at \( x = 0 \), which represents noon.
The equation given is:
\[ \text{Temperature} = 2x + 10 \]
Substituting \( x = 0 \):
\[ \text{Temperature} = 2(0) + 10 = 0 + 10 = 10 \]
Thus, the initial temperature (at noon) is 10°C.
So the correct response is 10°C.