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प्रश्न
Plot the points (2, 8), (7, 8) and (12, 8). Join these points in pairs. Do they lie on a line? What do you observe?
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उत्तर
Take a point O on the graph paper and draw the horizontal and vertical lines OX and OY respectively.
Then, let on the x-axis and y axis 1 cm represents 1 unit.
In order to plot point (2, 8), we start from the origin O and move 8 cm along OX. The point we arrive at is (2, 8).
To plot point (7, 8), we move 7 cm along OX and 8 cm along OY. The point we arrive at is (7, 8).
To plot point (12, 8), we move 12 cm along OX and 8 cm along OY. The point we arrive at is (12,8).
From the graph below, it can be seen that the points lie on a line parallel to x-axis because they have the same y-coordinate.
संबंधित प्रश्न
Number of children in six different classes are given below. Represent the data on a bar graph.
| Class | Fifth | Sixth | Seventh | Eighth | Ninth | Tenth |
| Number of children | 135 | 120 | 95 | 100 | 90 | 80 |
- How would you choose a scale?
- Answer the following questions:
- Which class has the maximum number of children? And the minimum?
- Find the ratio of students of class sixth to the students of class eight.
The following table shows the number of Buses and Trucks in nearest lakh units. Draw percentage bar-diagram. (Approximate the percentages to the nearest integer)
| Year | No. of Trucks | No. of Buses |
| 2005-2006 | 47 | 9 |
| 2007-2008 | 56 | 13 |
| 2008-2009 | 60 | 16 |
| 2009-2010 | 63 | 18 |
Use the bar graph (see the given figure) to answer the following question.
How many students have dog as a pet?
In a bar graph, the width of bars may be unequal.
The bar graph given below represents approximate length (in kilometres) of some National Highways in India.
Study the bar graph and answer the following questions:
Scale: 1 unit length = 200 km
- Which National Highway (N.H.) is the longest among the above?
- Which National Highway is the shortest among the above?
- What is the length of National Highway 9?
- Length of which National Highway is about three times the National Highway 10?
The bar graph given below represents the circulation of newspapers in different languages in a town.
Study the bar graph and answer the following questions:
Scale: 1 unit length = 200 Newspapers
- What is the circulation of English newspaper?
- Name the two languages in which circulation of newspaper is the same.
- By how much is the circulation of newspaper in Hindi more than the newspaper in Bengali?
The bar graph given below shows the marks of students of a class in a particular subject:
Study the bar graph and answer the following questions:
- If 40 is the pass mark, then how many students have failed?
- How many students got marks from 50 to 69?
- How many students scored 90 marks and above?
- If students who scored marks above 80 are given merits then how many merit holders are there?
- What is the strength of the class?
Study the bar graph given below and answer the questions that follow:
- What information is depicted from the bar graph?
- In which subject is the student very good?
- Calculate the average marks of the student.
- If 75 and above marks denote a distinction, then name the subjects in which the student got distinction.
- Calculate the percentage of marks the student got out of 500.
Study the double bar graph shown below and answer the questions that follow:
- What information is represented by the above double bar graph?
- In which month sales of Brand A decreased as compared to the previous month?
- What is the difference in sales of both the Brands for the month of June?
- Find the average sales of Brand B for the six months.
- List all months for which the sales of Brand B was less than that of Brand A.
- Find the ratio of sales of Brand A as compared to Brand B for the month of January.
The students of Class VII have to choose one club from Music, Dance, Yoga, Dramatics, Fine arts and Electronics clubs. The data given below shows the choices made by girls and boys of the class. Study the table and answer the questions that follow:
| Clubs | Music | Dance | Yoga | Dramatics | Fine Arts | Electronics |
| Girls | 15 | 24 | 10 | 19 | 27 | 21 |
| Boys | 12 | 16 | 8 | 17 | 11 | 30 |
- Draw a double bar graph using appropriate scale to depict the above data.
- How many students are there in Class VII?
- Which is the most preferred club by boys?
- Which is the least preferred club by girls?
- For which club the difference between boys and girls is the least?
- For which club is the difference between boys and girls the maximum?
