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aksik [14]
3 years ago
11

The scatter plot shows the number of stamps Katie collected in different months:. . Plot ordered pairs 1, 30 and 2, 70 and 3, 11

0 and 4, 150 and 5, 190. . What is the approximate predicted number of stamps she collected in the 25th month?. . A. 980. B.990. C.1000. D.1010
Mathematics
1 answer:
Virty [35]3 years ago
3 0
The sequence:
a 1 = 30,  a 2 = 70,  a 3 = 110,  a 4 = 150,  a 5 = 190,...
a 2 = a 1 + d
70 = 30 + d
d = 70 - 30 = 40
a n = a 1 + ( n - 1 ) * d
For the 25th month:
a 25 =  30 + 24 * 40 = 30 + 960 = 990
Answer: B ) 990.
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