Dids line-graph
7
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Dids line-graph
Transcript of Dids line-graph
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Data Interpretation
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Line graphs are used to show how a quantity changes continuously. Very often the quantity is measured as time changes. If the line goes up, the quantity is increasing; if the line goes down, the quantity is decreasing; if the line is horizontal, the quantity is not changing. To measure the height of a point on the graph, use your note board as a straight edge.
TRENDS IN INDUSTRIAL INVESTMENT, LABOUR PRODUCTIVITY, EMPLOYMENT AND OUTPUT, 1980 TO 2007
(Index numbers, 1980 = 100)
Line Graphs
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Q. The ratio of productivity in 2007 to productivity in 1980 was about (a)1 : 4 (b)1 : 3 (c)3 : 1 (d)4 : 1 In 2007 productivity had an index number of 400, and the index numbers are based on 1980 = 100. So the ratio is 400 : 100 = 4 : 1. Therefore, the answer is (d). Directions: The graph given here shows a car following the linear path with uniform
speed. Study the graph and answer the questions.
1 2 3 4 5
30
24
18
12
6
Dis
tanc
e (in
km
)
(1, 6
)
(2, 1
2)
(3
, 18)
(4, 2
4)
(5, 3
0)
Time (in hours)
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1. The speed of the car is
(a) 12 km/hr
(b) 6 km/hr
(c) 18 km/hr
(d) 24 km/hr
2. The speed of the car in metres per minute is
(a) 60
(b) 100
(c) 600
(d) 1000
3. The distance traveled by the car in 4.5 hours is
(a) 27 km
(b) 30 km
(c) 36 km
(d) 40 km
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Solution
1. (b) The car covers 6 km in 1 hour.
.. . Speed = 6 kmph
2. (b) Speed = 6 kmphm/min.
= 100 m/min
3. (a) Required distance = Speed × Time
= 6 × 4.5
= 27 km
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