Introduction To Graphs(8th Grade > Mathematics ) Questions and answers for exam Preparation

8th Grade > Mathematics

INTRODUCTION TO GRAPHS MCQs

Total Questions : 60 | Page 3 of 6 pages

Question 21. Find the perimeter of the square?

16 cm
8 cm
4 cm
2 cm

Discuss Question

Answer: Option B. -> 8 cm
:
B
Perimeter of the square =4a (where a is length of side)
Length of side of square = 2 cm
Perimeter of the square = 4 × 2= 8 cm

Question 22. Two points A & B are plotted on a graph with coordinates (2,3) and (3,2) respectively. The points A and B will coincide.

True
False
4 cm
2 cm

Discuss Question

Answer: Option B. -> False
:
B
For point A, X-coordinate= 2 Y-coordinate=3
For point B , X-coordinate = 3 Y-coordinate=2
Hence, they will not coincide.

Question 23. A graph which displays data that changes continuously over a period of time is __ graph.

Discuss Question

:
A line graph can be used to displaydata that changes continuously over a period of time.

Question 24. The type of graph which should be used to represent the given data is a
___

\begin{matrix} Weights (K g) & 40 - 45 & 45 - 50 & 50 - 55 & 55 - 60 & 60 - 65 No. of Person & 4 & 12 & 13 & 6 & 5 \end{matrix}

Discuss Question

:
The given data are grouped into classes. Hence the graph that should be used to represent them ishistogram.

Question 25. Three points A (4, 2), B (3, 3 ) and C ( 2,4 ) will lie on the straight line.

True
False
Pie chart
All of these

Discuss Question

Answer: Option A. -> True
:
A
After plotting point A, B and C on the graph. We will get a straight line.

Three Points A (4, 2), B (3, 3 ) And C ( 2,4 ) Will Lie On T...

Question 26. The bar graph shows the usual method of transport to school for the students in a class. How many students are there altogether in the class?

Discuss Question

Answer: Option C. -> 22
:
C
5 students uses bus
3 students uses bike
1 studentuses taxi
2 students uses train
6students uses car
5 students walk to school
Total number of students = 5 + 1 + 3 + 2 + 6 +5 = 22

Question 27. The bar graph shows the favourite colours of 20 students in a class. How many more of them favoured blue than pink?

Discuss Question

Answer: Option C. -> 3
:
C
6 of them favored blue and 3 favored pink.
6 − 3 = 3 .
Therefore 3 more favored blue than pink.

Question 28. The line graph below shows people in a store at various times of the day.
What is the busiest time of the day at the store?

1 pm
2 pm
3 pm
11 am

Discuss Question

Answer: Option A. -> 1 pm
:
A
From graph it can be seen that number of people in the store is highest at 1 pm.

Question 29.

T h e g i v e n t a b l e s h o w s d a i l y t e m p e r a t u r e s f o r D e l h i, r e c o r d e d f o r 6 d a y s, i n d e g r e e s C e l s i u s . P l o t a l i n e g r a p h . W h i c h o f t h e f o l l o w i n g s t a t e m e n t s i s t r u e .

\begin{matrix} (T e m p e r a t u r e i n D e l h i) Day & Temperature 1 & 6^{\circ} C 2 & 12^{\circ} C 3 & 10^{\circ} C 4 & 14^{\circ} C 5 & 15^{\circ} C 6 & 19^{\circ} C \end{matrix}

All the points lie on a common straght line
The temperature on a given day is never lower than that of the previous day
The highest temperature is on the 6th day
None of These

Discuss Question

Answer: Option C. -> The highest temperature is on the 6th day
:
C

The given table shows daily temperatures for Delhi, ...

The graph is as shown above. From the graph, it can be observed that the points do not form a straight line. It can be seen that the temperature is the highest on day 6.

Question 30. In CAT exam, Kevin scored 98% in the first attempt, 82% in the second attempt and 95% in the third attempt. This data can be best represented by

Bar graph
Line graph
Pie chart
All of these

Discuss Question

Answer: Option B. -> Line graph
:
B
Line graph can represent data that continuously changes with time because a line graph is such that for each and every value of time, a value of the datum can be obtained. For example, if my temperature is continuously changing with time, using a line graph my temperature at any time can be shown.