# RS Aggarwal Solutions Class 9 Chapter 6 Coordinate Geometry

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## RS Aggarwal Solutions Class 9 Chapter 6 Coordinate Geometry

### Exercise 6A

Question 1:
Draw the perpendiculars from the AF, BG, CH, DI and EJ on the x-axis.
(1) The distance of A from the y-axis = OF = -6 units
The distance of A from the x-axis = AF = 5 units
Hence, the coordinate of A are (-6, 5)

(2)The distance of B from the y-axis = OG = 5 units
The distance of B from the x-axis = BG = 4 units
Hence, the coordinate of B are (5, 4)

(3)The distance of C from the y-axis = OH = -3 units
The distance of C from the x-axis = HC = 2 units
Hence, the coordinate of C are (-3, 2)

(4)The distance of D from the y-axis = OI = 2 units
The distance of D from the x-axis = ID = -2 units
Hence, the coordinate of D are (2, -2)

(5)The distance of E from the y-axis = OJ = -1 unit
The distance of E from the x-axis = JE = -4 units
Hence, the coordinate of E are (-1, -4)

Thus, the coordinates of A, B, C, D and E are respectively, A(-6,5), B(5,4), C(-3,2), D(2,-2) and E(-1,-4)

Question 2:
Let X’OX and Y’OY be the coordinate axes.
Fix the side of the small squares as one units.
(i) Starting from O, take +7 units on the x-axis and then +4 units on the y-axis to obtain the point P(7, 4)
(ii) Starting from O, take -5 units on the x-axis and then +3 units on the y-axis to obtain the point Q(-5, 3)
(iii) Starting from O, take -6 units on the x-axis and then -3 units on the y-axis to obtain the point R(-6, -3)
(iv) Starting from O, take +3 units on the x-axis and then -7 units on the y-axis to obtain the point S(3, -7)
(v) Starting from O, take 6 units on the x-axis to obtain the point A(6, 0)
(vi) Starting from O, take 9 units on the y-axis to obtain the point B(0,9)
(vii) Mark the point O as O(0, 0)
(viii) Starting from O, take -3 units on the x-axis and then -3 units on the y-axis to obtain the point C(-3, -3)
These points are shown in the following graph: Question 3:
(i) In (7, 0), we have the ordinate = 0.
Therefore, (7,0) lies on the x-axis

(ii) In (0, -5), we have the abscissa = 0.
Therefore, (0,-5) lies on the y-axis

(iii) In (0,1), we have the abscissa = 0.
Therefore, (0,1) lies on the y-axis

(iv) In (-4,0), we have the ordinate = 0.
Therefore, (-4,0) lies on the x-axis

Question 4:
(i) Points of the type (-, +) lie in the second quadrant. Therefore, the point (-6,5) lies in the II quadrant.

(ii) Points of the type (-, -) lie in the third quadrant. Therefore, the point  (-3,-2) lies in the III quadrant.

(iii) Points of the type (+, -) lie in the fourth quadrant. Therefore, the point  (2,-9) lies in the IV quadrant.

Question 5:
The given equation is y = x + 1
Putting x = 1, we get y = 1 + 1 = 2
Putting x = 2, we get y = 2 + 1 = 3

Thus, we have the following table: On a graph paper, draw the lines X’OX and YOY’ as the x-axis and y-axis respectively.
Then, plot points P (1, 2) and Q (2, 3) on the graph paper. Join PQ and extend it to both sides.
Then, line PQ is the graph of the equation y = x + 1. Question 6:
The give equation is y = 3x + 2
Putting x = 1, we get y = (3 1) + 2 = 5
Putting x = 2, we get y = (3 2) + 2 = 8

Thus, we have the following table: On the graph paper, draw the lines X’OX and YOY’ as the x-axis and y-axis respectively.
Now, plot points P(1,5) and Q(2,8) on the graph paper.
Join PQ and extend it to both sides.
Then, line PQ is the graph of the equation y = 3x + 2. Question 7:
The given equation is y = 5x – 3
Putting x = 0, we get y = (5 × 0) – 3 = -3
Putting x = 1, we get y = (5 × 1) – 3 = 2

Thus, we have following table: On a graph paper, draw the lines X’OX and YOY’ as the x-axis and y-axis respectively.
Now plot the points P(0,-3) and Q(1,2).
Join PQ and extend it in both the directions.
Then, line PQ is the graph of the equation, y = 5x – 3. Question 8:
The given equation is y = 3x
Putting x = 1, we get y = (3 1) = 3
Putting x = 2, we get y = (3 2) = 6

Thus, we have the following table: On a graph paper draw the lines X’OX and YOY’ as the x-axis and y-axis respectively.
Now, plot points P(1,3) and Q(2,6).
Join PQ and extend it in both the directions.
Then, line PQ is the graph of the equation y = 3x. Question 9:
The given equation is y = -x
Putting x = 1, we get y = -1
Putting x = 2, we get y = -2

Thus, we have the following table: On a graph paper, draw the lines X’OX and YOY’ as the x-axis and y-axis respectively.
Now, plot the points P(1,-1) and Q(2,-2).
Join PQ and extend it in both the directions.
Then, line PQ is the graph of the equation y = -x. Complete RS Aggarwal Solutions Class 9

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