Page 221 - Maths Skills - 8

Introduction to Graphs 219

4. The vertical axis of the Cartesian plane is 2. Write the distance of point P from x-axis and
denoted as YOY’. the distance of point R from y-axis.

5. In P(x, y), y is the abscissa. E. Assertion-Reason Based Questions
Directions for Questions 1 to 2: In each of the
D. Case Study Based Questions questions given below, there are two statements
marked as Assertion (A) and Reason (R). Mark your
Vanmahotsava week or forest festival is celebrated answer as per the codes provided below:
in July every year in our school. The aim of this
festival is to create awareness about forests, specially (a) Both A and R are true and R is the correct
trees among students. Many students take part in explanation of A.
the celebration of this festival. Plantation of tree is (b) Both A and R are true but R is not the correct
an important part of this festival. Four students of explanation of A.
class - VIII planted trees in the given position as (c) A is true but R is false. (d) A is false but R is true.
shown in the graph.
Y Q. 1. Assertion (A): The coordinates of a point is (5,
9) and this point is located in quadrant I.
7 Reason (R): In quadrant I, both coordinates of a
6 Q R points are positive.
5 Q. 2. Assertion (A): Through graphs, we can find the
4 exact location of any point.
3 Reason (R): Graph shows the relationship
2 P S between x and y-coordinates of any point.
1
X
(0, 0) 1 2 3 4 5 6 7 8 SUBJECTIVE TYPE QUESTIONS
F. Solve the following word problems
Answer the following questions on the basis of the
above data. 1. Draw the graph between side of a cube and

1. Write the coordinates of the planted trees at volume of a cube.
P, Q, R, S. 2. Plot the graph of 7 and its multiples.

HOTS

1. A tourist travels by car from New Delhi Y
to Jaipur: The graph in figure shows the 300 Scale (y-axis): 1 cm = 50 km
distance of the car from the starting point at
different hours. Study the graph and answer 250
the following questions: 200
(i) What information is given on the 150
two axes of the graph? Distance (in km)
(ii) At what time did the tourist starts 100
his journey? 50
(iii) What is the distance covered by the 0 X
car in the first 3 hours? a.m a.m a.m a.m a.m a.m noon p.m p.m
11
9
10
2
1
12
6
7
8
(iv) Did the car stop at any point during the Time (in h)
journey? Give reason for your answer.
(v) At what time did the tourist reach Jaipur?