3.1 graphs.tst

3.1 Line Graphs
Name___________________________________
DSPM0800_______
Read p. 192-193, p. 197-198. An ordered pair (2, 3) will always have the horizontal number first and
the vertical number second.
1) The table below shows daily temperatures for New York City, recorded for 6 days, in degrees Fahrenheit.
Temperatures In NY
City
Day
1
2
3
4
5
6
Temperature
43° F
53° F
50° F
57° F
59° F
67° F
1. Does the temperature seem to be increasing or decreasing as the days pass?
2. Summarized this data in the graph below.
a) Number the horizontal axis from 0 to 8 to match the days. Label this axis with "Day"
b) Number the vertical axis from 0 to 70 to match the degrees. How much should each mark represent?
Label the vertical axis "Temperature in Fahrenheit".
c) Title the graph "Temperatures in NY City".
d) Plot each point on the graph: (1, 43), (2, 53), (3, 50), (4, 57), (5, 59), (6, 67). Connect the dots to form a
line.
e) Does the line seem to be an increasing or decreasing line as you move from left to right? Explain what
"increasing line" or "decreasing line" means in this problem.
y
x
See Back
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2) Sarah bought a new car in 2001 for $24,000. The dollar value of her car changed each year as shown in the
table below.
Value of Sarah's
Car
Year
2001
2002
2003
2004
2005
2006
2007
Value
$24,000
$22,500
$19,700
$17,500
$14,500
$10,000
$ 5,800
1. Does the value of the car seem to be increasing or decreasing as the years pass?
2. Summarized this data in the line graph below.
a) Number the horizontal axis from 0 to 8 to match the years from 2000 to 2008. Label this axis with "Years
since 2000."
b) Number the vertical axis from 0 to 26 to match the dollars in thousands. How much should each mark
represent? You will need to round the values to thousands. Label the vertical axis "Car Value in thousands of
dollars".
c) Title the graph "Value of Sarah's Car".
d) Plot each point on the graph: (1, 24), (2, 23), (3, 20), (4, 18), (5, 15), (6, 10), (7, 6). Connect the dots to
form a line.
e) Does the line seem to be an increasing or decreasing line as you move from left to right? Explain what
"increasing line" or "decreasing line" means in this problem.
y
x
2