The Line graph is a pictorial representation of data and helps determine trends and rates of change. The slope of the graph helps in computing the magnitude of change between two consecutive points. This graph is similar to the bar graph except for the fact that here data is in nature of the flow mode, and not discrete. The line graph indicates changes in plotted variables with respect to the two indices calibrated on the X and the Y axes respectively. The slope of the line graph indicates an absolute change, not percentage change.
11. What is the respective ratio between the percentage of marks of student-B in BSc. & student-C in class-X?
Ans: 7 : 6
Explanation: Required ratio = 70 : 60 = 7 : 6
12. Performance of which student has consistently decreased from class-XII to M Phil?
Ans: Only C
Explanation: It is obvious from the graph, as it shows downward trend for student C.
13. To get admission for PhD course one has to consistently score more than 60 per cent of marks in each of the five classes. Which student will be able to get admission for PhD course?
Ans: Only B
Explanation: Only B has scored more than 60 per cent of marks in each of the five classes.
14. Which one of the following sets of students got highest percentage of marks in MSc, & which one of lowest percentage of marks in Class-X respectively?
Ans: B and C
Explanation: It is obvious from the graph. Student-B scored the highest marks in M.Sc and Student - C scored the lowest marks in Class X.
15. Percentage of which student increased from Class-X to MSc but decreased from MSc, to M Phil.?
Ans: Only B
Explanation: It is student B.
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