Identify the type of sequence.

4, –4, 4, –4,. . .

2, 2 1/3, 2 2/3, 3, 3 1/3,. . .

1/10, 3/20, 5/30, 7/40,. . .

in steps

Step-by-step explanation:

4, –4, 4, –4,. . .   Geometric with common ratio of -1

2, 2 1/3, 2 2/3, 3, 3 1/3,. . .Arithmetic  with common difference of 1/3

1/10, 3/20, 5/30, 7/40,. . .  neither

first picture(left): geometric, ratio 1/2

2nd picture (right): arithmetic, difference -4

4

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: