For Items 38-40 PAGASA has kept a record of the highest heat Index per day as shown below:
Date Temperature
May 3, 2021 38 °C May 4, 2021 39.5 °C A May 4, 2021 B. May 5, 2021 May 5, 2021 41.3 °C C. May 6, 2021 D. May 7, 2021 May 6, 2021 40.5 °C May 7, 2021 41.05 °C

38 in which day is the heat index highest?

39. What is the behavior of temperature values from May 3, 2021 until May 5, 2021? A constant B. decreasing C fluctuating D. increasing

40. What is the difference between the highest and lowest temperatures? A. 33°C B. 2.95 °C C. 2.85 °C D. 2.73 °C​