Line Charts - Data Interpretation Questions

line-charts-data-interpretation

1) How far, in km, did Alex drive between 5:30 and 6:00?
(A) 20
(B) 17 1/2
(C) 35
(D) 12 1/2

View Answer

Answer: Option B

Solution:
Since Alex is driving at constant speed 35 km/hour during 5:30 to 6:00.
Thus in half hour he drove
1/2
* 35
= 17
1/2

2) What was Alex's average speed, in km per hour between 5:30 to 6:30?
(A) 25.25
(B) 35.5
(C) 42.5
(D) 36.25

View Answer

Answer: Option D

Solution:
From the graph we see that clearly from 5:30 to 6:00 Alex average speed was clearly 35 km/hour, and from 6:00 to 6:30 Alex speed steadily increased from 35 to 40 km/hour, so during 6:00 to 6:30 hour his average speed was:
35 + 40/2
=
75/2
= 37.5 km/hour
Thus in the given hour his average speed was:
37.5 + 35/2
= 36.25 km/h

3) For what percent of time Alex driving at 35 Km per hour or faster?
(A) 35
(B) 25
(C) 27
(D) 50

View Answer

Answer: Option D

Solution:
From the graph we see that 5:30 to 6:45 (1
1/2
hour) the car is driven 35 or more than 35 km/hour which is half time of the total time (5:00 to 7:30)  2
1/2
hours
Hence the answer is 50%

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