The graph shows how sea ice extent in the arctic region has changed since 1975. classify the questions based on whether they can or cannot be answered using the graph.

CAN be answered by the graph:

What's the overall change in sea ice extent since 1980?

In which year was sea ice extent the highest?

How sea ice extent fluctuated every five years since 1980?

CANNOT be answered by the graph:

How has the change in sea ice extent affected precipitation?

Which region has been most affected by reduced sea ice extent?

What's the estimated sea ice extent in 2020?

Explanation:

The chart only provides information regarding the sea ice extent, from 1980 to 2013 or so.   There is enough information in the graph to answer the first 3 questions listed above in the answer section:

What's the overall change in sea ice extent since 1980?

In which year was sea ice extent the highest?

How sea ice extent fluctuated every five years since 1980?

However, based only on the graph we CANNOT answer these questions:

How has the change in sea ice extent affected precipitation?

- No information regarding precipitation.

Which region has been most affected by reduced sea ice extent?

- No information regarding any region.

What's the estimated sea ice extent in 2020?

- The graph ends in 2013... no information regarding 2020.

CAN be answered by the graph:

What's the overall change in sea ice extent since 1980?

In which year was sea ice extent the highest?

How sea ice extent fluctuated every five years since 1980?

CANNOT be answered by the graph:

How has the change in sea ice extent affected precipitation?

Which region has been most affected by reduced sea ice extent?

What's the estimated sea ice extent in 2020?

Explanation:

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