156 CHAPTER 3 Graphs, Linear Equations, and Functions
5.Concept Check Match each situation in (a) – (d) with the most appropriate graph
in A – D.
(a)Sales rose sharply during the first quarter, leveled off during the second quarter, and
then rose slowly for the rest of the year.
(b)Sales fell sharply during the first quarter and then rose slowly during the second and
third quarters before leveling off for the rest of the year.
(c)Sales rose sharply during the first quarter and then fell to the original level during the
second quarter before rising steadily for the rest of the year.
(d)Sales fell during the first two quarters of the year, leveled off during the third quarter,
and rose during the fourth quarter.
A. B. C. D.
12 34
5
15
25
x
y
Quarter
Sales (in units) 12 34
5
15
25
x
y
Quarter
Sales (in units) 12 34
5
15
25
x
y
Quarter
Sales (in units) 12 34
5
15
25
x
y
Quarter
Sales (in units)
6.Concept Check Using the given axes, draw a graph that
illustrates the following description:
Profits for a business were $10 million in 2000. They
rose sharply from 2000 through 2004, remained con-
stant from 2004 through 2008, and then fell slowly
from 2008 through 2010.
Concept Check Determine the slope of each line segment in the
given figure.
7.AB 8.BC 9.CD
10.DE 11.EF 12.FG
13.Concept Check If Aand Fwere joined by a line segment in the figure for Exercises 7–12,
what would be the slope of the segment?
14.Concept Check If Band Dwere joined by a line segment in the figure for Exercises 7–12,
what would be the slope of the segment?
2000 2010
5
0
10
15
20
25
x
y
Year
Profit (in millions
of dollars)
x
y
A
C B
D
E
F
G
15 ft
?
50 ft
NOT TO SCALE
?
3.A ladder leaning against a wall has
slope 3. How many feet in the horizontal
direction correspond to a rise of 15 ft?
4.A hill has slope 0.05. How many feet in
the vertical direction correspond to a run
of 50 ft?
