After the recorded temperatures were graphed:

• The temperature of water in the white can increased from 22-22.5ºC over 5  hours.
• The temperature of water in the yellow can increased from 22-24ºC over 5 hours.
• The temperature of water in the brown can increased from 22-26ºC over 5 hours.
• The water in the black can showed the highest increase in temperature from 22-27ºC over 5 hours.