3. (#55, p. 142) A roller coaster begins on flat elevated track that is 15 feet above the ground, as shown (point B). After traveling 50 feet on the flat stretch of track to point C, it begins climbing a hill. The top of the hill (point D) is 80 feet above the ground and 100 feet horizontally from the beginning position of the ride. B 15ft C B (c). What does the slope indicate? 50ft 100ft (a). If we were to graph the line representing the hill in the coordinate plane with the origin at point A, what would be the coordinates of points C. and D? (b). Find the slope of the hill the coaster climbs. Soft ↓

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A: First three parts are as solved before.

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A:

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