Engineering, a company that specializes in the construction of antipollution filtration devices, has recorded the following sales record over the last 9 years: Year 1987 1988 1989 1990 1991 1992 1993 1994 1995 Sales (x 100,000) 13 15 19 21 27 35 47 49 97 a) Plot these data with suitable scale and define shape. b) Develop the linear estimating equation that best describes these data, and plot this line on the graph from part (a).
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Q, 1:
Environtech Engineering, a company that specializes in the construction of antipollution filtration devices, has recorded the following sales record over the last 9 years:
Year |
1987 |
1988 |
1989 |
1990 |
1991 |
1992 |
1993 |
1994 |
1995 |
Sales (x 100,000) |
13 |
15 |
19 |
21 |
27 |
35 |
47 |
49 |
97 |
a) Plot these data with suitable scale and define shape.
b) Develop the linear estimating equation that best describes these data, and plot this line on the graph from part (a).
c) Develop the second-degree estimating equation that best describes these data, and plot this curve on the graph from part (a).
d) Does the market to the best of your knowledge favor (b) or (c) as the more accurate estimating method?
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