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The total rainfall in Laketown in 1999 was 7.3 inches. In 2000, it was 1.1 inches.

a) Absolute change: -6.2 inches, Relative change: -84.9%
b) Absolute change: -6.2 inches, Relative change: 8.5%
c) Absolute change: 6.2 inches, Relative change: -563.6%
d) Absolute change: 6.2 inches, Relative change: 563.6%
e) None of the above

Answer :

Option (a). The absolute change is the difference between the final value and the initial value. In this case, the final value is the rainfall in Laketown in 2000, which is 1.1 inches.

The initial value is the rainfall in Laketown in 1999, which is 7.3 inches. Therefore, the absolute change is:

Absolute change = Final value - Initial value

= 1.1 - 7.3

= -6.2 inches

The relative change is the absolute change expressed as a percentage of the initial value. To calculate the relative change, we use the formula:

Relative change = (Absolute change / Initial value) x 100%

In this case, the initial value is the rainfall in Laketown in 1999, which is 7.3 inches. Therefore, the relative change is:

Relative change = (Absolute change / Initial value) x 100%

= (-6.2 / 7.3) x 100%

= -84.9%

Since the relative change is negative, we know that there was a decrease in the rainfall from 1999 to 2000. Option (a) correctly shows the absolute change as -6.2 inches and the relative change as -84.9%.

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