SOLUTION: A newborn baby's weight is recorded each month, from the day of birth until 12 months. One baby's weights, in pounds, are recorded below: 7.20, 9.15, 11.01, 12.56, 14.04, 15.43,

Question 1062721: A newborn baby's weight is recorded each month, from the day of birth until 12 months. One baby's weights, in pounds, are recorded below:
7.20, 9.15, 11.01, 12.56, 14.04, 15.43, 16.52, 17.68, 18.77, 19.69, 20.22, 21.05, 21.90

What is the average amount of monthly weight gain, rounded to the nearest hundredth of a pound, each month?

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Subtract the first from the second, etc. to the 12th from the 13th.
Add the differences and divide by 12.
1.95
1.86
1.55
1.48
1.39
1.09
1.16
1.09
1.92
0.53
0.83
0.85
Sum is 15.70
Divide by 12
Average monthly weight gain per month is 1.31 pounds.
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