The graph below shows the membership numbers of the Wombatong Rural Women’s Association each year for the years 2008–2018.
- How many members were there in 2009? (1 mark)
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- Show that the average rate of change of membership numbers from 2013 to 2018 was − 6 members per year. (1 mark)
- If the change in membership numbers continues at this rate, how many members will there be in 2021? (1 mark)