The line graph shows the number of hit songs released in rock, jazz and hip hop from 1950 to 1999, while the pie chart illustrates the global popularity of these genres during this period.
As the line graph shows, the popularity rock music increased significantly in 1950-1979, from starting with 50 songs to reaching a peak in 1970 with 400 hit songs. However, this trend declined the next year, scoring hits with 250 songs in 1999. On the other hand, jazz music followed a reversal way, as its hit songs declined from 200 in 1950 to nearly 50 in 1980 and had a notable upward trend until the end of 1990s. In addition, the evolution of hip hop songs is impressive. Specifically, there were no hits until the 1960s, when they began to grow slowly and more considerably later, reaching to almost 300 songs in 1999. More generally, according to the pie chart, rock was the post popular music with a percentage of 55% overall. Then, jazz follows with 27% and with a small difference of 9%, there is hip hop in popularity of songs during 1950 to 1999.
In conclusion, it is evident that people’s preferences in music changes a lot through the years. Through the period 1950-1999, rock music dominated most years, jazz declined but recovered and hip-hop showed a steady rise, eventually taking the lead after 1987 in hit songs.