Use the following information to answer questions 46-49.
A balloonist collecting data on pollutants at various levels above the ground takes off at 8:00 A.M. When the balloon is in motion, it moves only straight up or straight down and at a constant speed within each hour-long interval. The balloon is at an altitude that is a multiple of 100 meters at the beginning of each hour. The balloon lands at 2:00 P.M. at the same spot from which it took off. The altitude of the balloon, in meters above the ground, is shown in the figure below.
48. Which of the following graphs best represents the absolute value of the balloon's velocity, in meters per hour, between 8:00 A.M. and 2:00 P.M. ?
(Note: Ignore acceleration and deceleration.)
Your Answer is
Correct Answer is F
Explanation
Because the slope of the function image is the ratio of distance to time, that is, the speed, the larger the slope of the function image, that is, the steeper, the faster the speed, and because they are all linear function images, the acceleration is zero, that is, Each segment moves at a constant speed. According to the above characteristics, F is selected