Unformatted text preview: tank and the oxygen supply in the water. 66. (a) y 5 20.627 x 1 338.622 [0, 30] by [ 2 100, 1000] (b) When x 5 30, y < 957.445. According to the regression equation, about 957 degrees will be earned. (c) The slope is 20.627. It represents the approximate annual increase in the number of doctorates earned by Hispanic Americans per year. 67. (a) y 5 14.60175 ? 1.00232 x (b) Solving y 5 25 graphically, we obtain x < 232. According to the regression equation, the population will reach 25 million in the year 2132. (c) 0.232% y x 3 –3 –3 3 (–3, –2) (–1, 1) (1, –1) (3, 2) y x 3 3 –3 –3 (–3, 2) (–1, –1) (1, –1) (3, 2) y x 4 –2 4 (–1, –2) (2, 4) (3, –2) y = 3 f ( x – 2) – 2 y x 3 2 –4 (–4, 1) (–1, –3) (0, 1) y = –2 f ( x + 1) + 1 y x 3 –3 –3 3 (–3, 0) (0, –2) (1, 0) y = – f ( x ) Chapter 1 Review 41...
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 Spring '08
 GERMAN
 Regression Analysis

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