Question

Read the adjoining bar graph showing the number of students in a particular class of a school.


Answer the following questions:
(a) What is the scale of this graph?
(b) How many new students are added every year?
(c) Is the number of students in the year 2003 twice that in the year 2000?

Answer 1

After observing the given bar graph,
(a) The scale is 1 unit length equals 10 students.
(b) 10 students are added every year.
(c) Number of students in year 2000 = 30
Number of students in year 2003 = 60 = 2 $\times$ 30
$\therefore$ Number of students in year 2003 = 2 $\times$ Number of students in year 2000
Thus, the number of students in year 2003 is twice that of year 2000