Rearrange the proportion: (1st Picture involving 15 over A = 12 over B)
identify the ratio of; (A over B)
in simplest form.

Write your answer as a fraction using the / key.

Step-by-step explanation:

Given:  

To find the ratio of 'a' and 'b', just cross-multiply the given fraction to make the form of 'a' ratio 'b'.

Dividing numerator and denominator by a common value i.e 3, for simplest form

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

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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step-by-step explanation: