Lesson 13-9 for exercise sets. &KDSWHU 3UDFWLFH $FWLYLWLHV1.Write a situation for each of graphs A and B on page 368.2.Discuss and Write Zelma sets her car’s cruise control at 60 miles per hour.
Sketch and describe a graph that shows her speed related to time. Now
sketch a graph that shows her distance traveled related to time. Explain the
differences in the graphs.You can sketch a graph based on a situation.
Jeanette leaves home on her bicycle at 10 A.M. and travels quickly to
the library for a study session with friends. She stays at the library from
10:15 A.M. until noon. At noon, loaded down with books, Jeanette slowly
rides her bicycle home again. She stays at home from 12:30 until 1:00 P.M.
and then rides her bicycle to the beach, which is closer to her house, in
15 minutes. She then stays there for the rest of the afternoon.
Sketch a graph that relates time to the distance
Jeanette is from home.
To graph this situation, first break the situation into
different events. Then graph the events so that each
event starts where the preceding event finishes.
Event 1: Jeanette quickly bicycles to the library at 10:00.
Event 2:Jeanette studies from 10:15 to 12:00.
Event 3:Jeanette bicycles home slowly.
Event 4:Jeanette stays at home from 12:30 to 1:00.
Event 5:Jeanette leaves at 1:00 for a 15-minute ride
to the beach.You can also create a verbal or written description of a situation based on a graph.
Mr. Satay is a city truck driver. In the course of 1 hour,
he makes several deliveries. Suppose his company
made a graph to show his activities for that hour and
how the activities relate to the truck’s speed and the
time he traveled.
Use the graph to tell a story about the hour graphed.
In the graph, time is related to speed (miles per hour).
Mr. Satay’s hour starts with him accelerating to 25 miles
per hour and driving at that constant speed for about
20 minutes. He then stops his truck for about 10 minutes
to make a delivery. Mr. Satay gets back in his truck to
go to his next delivery. He accelerates again, this time
to 20 miles per hour and drives at this constant speed
for about 15 minutes. He stops for about 5 minutes,
makes his delivery, and then continues on his route. Now, Mr. Satay accelerates
to 45 miles per hour. He drives at that constant speed for about 5 minutes
and then stops to make his last delivery of the hour.'LVWDQFHIRUP+RPH7LPH(^0) 11:00 12:00 1:00
Bicycling
more slowly
Bicyclingquickly home At beach
to library
At library
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