To interpret the equation \( T(x) = 2x + 10 \), where \( T(x) \) represents the temperature in degrees Celsius and \( x \) is the number of hours after noon:
- The initial value can be found by evaluating the equation when \( x = 0 \) (which corresponds to noon):
\[ T(0) = 2(0) + 10 = 10 \]
Thus, the initial value of the temperature at noon (when \( x = 0 \)) is \( 10 \) °C.
The correct response is: 10°C