The bar graph represents the comparison of distinct types of music that was purchased in britain while, line graph reveals the sales of PoP, classical and Rock music in billion pounds over the time period of 40 years.
It is apperant from former illustration that the sales of pop music in first two years remained higher by earning 5 billion pounds which alarmingly delined in remaining tow decades and went under 4 billion pounds. Nextly, sales of Rock music remained under 4 billion pounds throught the time period of 4 years. Finally, classical music's sales also followed the same trend as Pop music but ever went higher than 4 billions.
It further clear from latter illustration that in the begining of 1970's Pop and Rock started sailing aproximately from 3 billion that gradually incline throughout the begining of 1980. While, pop music sales kept on surging and Rock music sales fell down in last decade. On the other hand, Classical music's sale was 4 billion in 1960's which reaced below 2 billion pounds by 1990.
Overall, Pop music was the most popular music in britain which kept on increasing for sailing. 
The bar graph represents the comparison of distinct types of  
music
 that was  
purchased
 in  
britain
 while, line graph reveals the  
sales
 of  
PoP
, classical and  
Rock
  music
 in  
billion
 pounds over the time period of 40 years.
It is  
apperant
 from former illustration that the  
sales
 of pop  
music
 in  
first
 two years remained higher by earning 5  
billion
 pounds which  
alarmingly
  delined
 in remaining tow decades and went under 4  
billion
 pounds.  
Nextly
,  
sales
 of  
Rock
  music
 remained under 4  
billion
 pounds  
throught
 the time period of 4 years.  
Finally
, classical music's  
sales
  also
 followed the same trend as Pop  
music
  but
 ever went higher than 4 billions. 
It
  further
  clear
 from latter illustration that in the  
begining
 of  
1970's
 Pop and  
Rock
  started
 sailing  
aproximately
 from 3  
billion
 that  
gradually
 incline throughout the  
begining
 of 1980. While, pop  
music
  sales
  kept
 on surging and  
Rock
  music
  sales
 fell down in last decade.  
On the other hand
, Classical music's  
sale
 was 4  
billion
  in 1960's
 which  
reaced
 below 2  
billion
 pounds by 1990. 
Overall
, Pop  
music
 was the most popular  
music
 in  
britain
 which  
kept
 on increasing for sailing.