question_answer

In a school/ there are five sections of class VII. The number of students in each section is given below. Construct a bar graph representing this data:

Section	A	B	C	D	E
Number of student	40	48	52	45	30

Answer:

We go through the following steps to construct the bar graph :

(a) Take a graph paper and draw two lines OX and OY perpendicular to each other. Call the horizontal line as OX and the vertical line as OY.

(b) Along the horizontal axis OX, mark ?sections of Class VII? and along the vertical axis OY mark ?No. of students?.

(c) Along the horizontal axis OX, choose the uniform (equal) width of the bars and the uniform gap between them.

(d) Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 small division to represent 1 student.

(e) Calculate the heights of the various bars as follows:

Height of the bar for section A = 40 × 1

= 40 small divisions = 4 big divisions

Height of the bar for Section B = 48 × 1

= 48 small divisions

= 4 big divisions and 8 small divisions

Height of the bar for Section C = 52 × 1 1

= 52 small divisions

= 5 big divisions and 2 small divisions

Height of the bar for Section D = 45 small divisions

= 4 big divisions and 5 small divisions.

Height of the bar for Section E = 30 small divisions

= 3 big divisions.

(f) We draw the bars as shown in Fig. below and on the top of each bar, we write the number of students represented by it.