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The Seneca Children's Fund is a local charity that runs summer camps for disadvantaged children. The fund's...

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Basic Math

The Seneca Children'sFund is a local charity that runs summer camps for disadvantagedchildren. The fund's board of directors has been working very hardin recent years to decr4ease the amount of overhead expenses, amajor factor in how charities are rated by independent agencies.The following data show the percentages of the money the fund hasraised that was spent on administrative and fund-raising expensesfor 2006-2012.

Year      Expense (%)

2006           13.7

2007           13.9

2008           14.8

2009           14.6

2010           14.9

2011           15.1

2012           15.6

a. Construct a timeseries plot. What kind of relationship exists in the data?

b. Develop a lineartrend equation for these data.

c. Forecast thepercentage of administrative expenses for 2013.

d. Using a smoothingconstant of .2 forecast a value for 2013.

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