To determine on which day Clara would use a positive number to write the temperature, we need to consider the context typically associated with weather forecasts. Generally, positive numbers represent temperatures above 0 degrees (Celsius or Fahrenheit, depending on the forecast context).
Without specific temperature values from the table, I can't directly provide an answer, but in most cases, temperatures on days that are warmer (like sunny days) would indeed use positive numbers, whereas colder days (especially during winter months) might show negative temperatures.
Typically, you would be looking for a day in the forecast that has temperatures above 0 degrees to answer this question.
If you have the temperature values from the table, look for them and identify which day has a positive temperature value. If you can’t see the values, I would suggest choosing the day that typically has warmer weather.
If you can provide the actual values or indicate them in some way, I'd be happy to help identify the correct day!