Month Web Site Visits Month Web Site Visits 1 537 13 822 2 375 14 677 3 419 15 1,031 4 276 16 657 5 445 17 983 6. 512 18 774 7 670 19 1,210 8. 561 20 811 9. 705 21 1,137 10 619 22 763 11 768 23 1,225 12 645 24 941
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
The River is a literary magazine published by the English Department at Tech. It has a 70-year
history and enjoys an excellent reputation for providing a literary outlet for aspiring Appalachian
writers in particular. However, its sales, mostly through independent bookstores and
college libraries, have never been very large. Several years ago, the magazine’s advisory board
decided to create a Web site and post the bi-monthly issues online for free access. Due to poor
economic conditions and state budget cuts, Tech recently withdrew funding for the magazine,
and in order to make up for this financial loss, the magazine’s staff has decided to try to sell advertising
(especially to local and regional businesses) on the magazine’s Web site. In order to sell advertising, the magazine’s staff would like to be able to provide potential advertisers with
a forecast of the number of “visits” the Web site might receive in future months. Following is
the number of monthly visits the Web site has received for the 24 months that it has existed: Develop a linear trend line forecast, an exponential smoothing forecast (a = 0.60), and a
3-month weighted moving average (with the most recent month weighted by 0.50, the next
closest month by 0.30, and the final month by 0.20). Indicate which one you believe is the most
accurate forecast model and the forecast for month 25.
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