Need Help with A,B and C. This is Business Math. The following graph shows the a

Question

Need Help with A,B and C. This is Business Math.

The following graph shows the approximate number (in thousands) of people who emigrated from Ireland during the period 2006-2010. (a) During which 2 year interval9s) was the magnitude of the average rate of change of E(t) greatest? 2006-2006 2007-2009 2008- 2010 during the 2-year interval(s) with the greatest magnitude, emigration from Ireland was at an average rate of people (b) during which 2-year interval(s) was the magnitude of the average rate of change of E(t) least? 2006-2008 2007-2009 2008-2010

Explanation / Answer

(a)

The answer is certainly 2009 because the peak reaches the highest point at 2009.

However the answers which include these two years are

2007-2009 ( where 2009 is inculded)

The next answer is 2008-2010 which also inculdes the value 2009. Hence the options are

2007-2009 and also 2008-2010 This is the answer. The rate is 60.

(b) During which 2 year intervals was the magnitude of the average rate of E(t) least?

The answer is 2006-2008. The rate of change is the lowest at this point (rate is 38).

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