Answer: Relative to when Iko woke up, the temperature dropped by 3 degrees.
Step-by-step explanation:
The data that we have is:
Between Iko woke up and the lunchtime, the temperature risen by 11°
If the temperature when Iko woke up is T0, we have that the temperature at the lunchtime hour is T0 + 11°
When he went to bed, the temperature dropped by 14°
So the new temperature is T0 + 11° - 14° = T0 - 3°
The difference between the temperature relative to when Iko woke up is equal to the final temperature minus the temperature when Iko woke up, this is:
T0 - 3° - T0 = -3°
This means that the total change in temperature is equal to -3°
