Two line graphs reflect two types of trends in a city called: a popular trend and other one is a general trend in the age structure in a 70 years of time range starting from 1970 to 2040. Both the graps shows an overall upward trend.
A cursory look in the first graph shows that, number of population in urban areas is much higher than in rural areas, starting at approximately 20% in 1970 then increasing until 2000 where it reaches around 45% before a slight fall and maintaining a straight line just under 50% until 2020, where it strats to grow again and reaches its apex (62%) in 2040, which is overwhelmingly higher than the percentage in rural areas. In rural areas, the percentage of thepopulation starts at about 10% in 1970 and, with a steady increasing rate, it reaches its peak, which is just over 20%, in 2040, with a flat line between 2020 and 2030.
Further examination of the other line graph shows that the population in Piltover is mostly in the 15-60 years-old. The total number in this age group starts atapproximately 25% and increaaes over the time period, hitting its peak, just over 50%, in 2040, while the other age group, the under 15-year-old group, starts at about 5%, shows a steady increase until 1980, just before a sharp increase until 1990. Then the trend goes downward until 2010 and then shows an increasing rate until 2040, while the over-60-year-old group starts near 10% in 1970 and ends near 15% in 2040. An intersection of these two groups, is seen and in 1990 the trend was totally opposite.