We can see the bar for social studies begins right below 85 in the year 2000. By the year 2003, the bar is right below 80; this is a change of about 5.
The other bar that decreased over the time period was English. It began at a little above 75 (roughly 77). It ends right below 75; this is a change of around 3. Social studies decreased more.
Math and Science both went up, so the only two options are English and Social Studies.
English started at 77 and went to 74.
Social Studies started at 84 and went to 79.
first, we define the variables:
x: number of years after 1950
f (x): amount of vinyl sold.
then, with the variables defined, we have:
68594 vinyl records were sold in 1958 > f (8) = 68594
91299 vinyl records were sold in 1961 > f (11) = 91299
38720 vinyl records were sold in 1952 > f (2) = 38720
161743 vinyl records were sold in 1967 > f (17) = 161743
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