Average Annual Decline of Native Species

Question

Based on the data in the table, what is the average annual decline in the native species count over the 20-year period?

| Year | Native Species Count | Invasive Species Count |
|------|----------------------|------------------------|
| 2000 | $$1000$$           | $$50$$               |
| 2005 | $$900$$            | $$80$$               |
| 2010 | $$800$$            | $$120$$              |
| 2015 | $$700$$            | $$160$$              |
| 2020 | $$600$$            | $$200$$              |

Accepted Answer

Approximately $$20$$ individuals per year

Answer

Approximately $$30$$ individuals per year (this result may arise from an incorrect division of the total decline over the wrong number of years)

Answer

Approximately $$15$$ individuals per year

Answer

Approximately $$25$$ individuals per year

Year	Native Species Count	Invasive Species Count
2000	$1000$	$50$
2005	$900$	$80$
2010	$800$	$120$
2015	$700$	$160$
2020	$600$	$200$

Average Annual Decline of Native Species

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