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# Basic Graphing

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46. Technology. Driving down a mountain, Tom finds that he has descended 1800 ft
in elevation by the time he is 3.25 mi horizontally away from the top of the
mountain. Find the slope of his descent to the nearest hundredth.

Section 7.2 pp. 626-627 16,20,28

16. Find the slope of any line perpendicular to the line through points (0, 5) and
(-3, -4).

In exercises 19 to 21, use the concept of slope to determine if the given figure is a parallelogram
or a rectangle.

20.

27. Geometry. Floor plans for a building have the four corners of a room located at the
points (2, 3), (11, 6), (-3, 18), and (8, 21). Determine whether the side through the
points (2, 3) and (11, 6) is parallel to the side through the points (-3, 18) and (8, 21).

28. Geometry. For the floor plans given in exercise 27, determine whether the side
through the points (2, 3) and (11, 6) is perpendicular to the side through the points
(2, 3) and (_3, 18).