What would you assume at the beginning of an indirect proof for the following?
a number that is divisible only by itself and 1 is a prime number. 51 is not a prime number.

a. 51 is a prime number.
b. 51 is not a prime number.
c. prime numbers are not divisible by themselves and 1.
d. 51 is not divisible by itself and 1.

I would assume that it is not a prime number as it seems to be divisible by 3.

step-by-step explanation:

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: