(a) The double bar graph compares the information about minimum temperature (oC) of year 2008 and year 2009 during the months November to February
(b) Minimum temperature in the year 2008 for the month of November – 18°C
Minimum temperature in the year 2009 for the month of November = 15°C
∴ Required ratio = 18/15 = 6/5 i.e., 6:5
(c) For the month of November and February, i.e., 2 months the minimum temperature in 2008 was greater than that of 2009
(d) Average minimum temperature for 2008
= 11.25°C
(e) In the month of February, the variation in two temperatures is maximum.