Answer:
Mean annual temperature change ≈ 11°C (to nearest degree)
Step-by-step explanation:
The mean annual temperature change = sum of temperature change of the 12 months ÷ 12
= (-5 + 2 + 6 + 10 + 15 + 22 + 24 + 21 + 17 + 12 + 6 + (-3)) ÷ 12
= 127 ÷ 12
Mean annual temperature change ≈ 11°C (to nearest degree)