The line graph compares average yearly spending by Americans on mobile and landline phone services from 2001 to 2010. It is clear that spending on landline phones fell steadily over the 10-year period, while mobile phone expenditure rose quickly. The year 2006 marks the point at which expenditure on mobile services overtook that for residential phone services. In 2001, US consumers spent an average of nearly $700 on residential phone services, compared to only around $200 on cell phone services. Over the following five years, average yearly spending on landlines dropped by nearly $200. By contrast, expenditure on mobiles rose by approximately $300. In the year 2006, the average American paid out the same amount of money on both types of phone service, spending just over $500 on each. By 2010, expenditure on mobile phones had reached around $750, while the figure for spending on residential services had fallen to just over half this amount. The diagram illustrates the various stages in the life of a honey bee. We can see that the complete life cycle lasts between 34 and 36 days. It is also noticeable that there are five main stages in the development of the honey bee, from egg to mature adult insect. The life cycle of the honey bee begins when the female adult lays an egg; the female typically lays one or two eggs every 3 days. Between 9 and 10 days later, each egg hatches and the immature insect, or nymph, appears. During the third stage of the life cycle, the nymph grows in size and sheds its skin three times. This moulting first takes place 5 days after the egg hatches, then 7 days later, and again another 9 days later. After a total of 30 to 31 days from the start of...
