Examples
Ex 1:
From the graph:
- find the coordinate of A, B, E, P, and Q.
- find abscissa of C.
- find the ordinate of D.
Sol:
Given graph is
(i) The x-coordinate and y-coordinate of the point A are (–5, 4).
The x-coordinate and y-coordinate of point B are (–5, –4).
The x-coordinate and y-coordinate of point E are (5, –6).
The x-coordinate and y-coordinate of the point P are (–2, –3).
The x-coordinate and y-coordinate of the point Q are (3, –2).
(ii) The abscissa and ordinate of point C are 5 and 3 respectively.
Hence, the abscissa of C is 5.
(iii) The abscissa and ordinate of point D are –5 and –6 respectively.
Hence, the ordinate of D is –6.
Ex 2:
From the graph:
- find the coordinate of B.
- find the coordinate of L.
- find the coordinate of M.
- find the coordinate of S.
Sol:
Given graph is
(i) The Point B lies in the I quadrant.
So quadrant I contain all coordinates with positive x and positive y values.
Hence the coordinate of point B is (4, 3).
(ii) The point L lies in the III quadrant.
So quadrant III contains all coordinates with negative x and negative y values.
Hence the coordinate of point L is (–5, –4).
(iii)Point M lies in the II quadrant.
So quadrant II contains all coordinates with negative x and positive y values.
Hence the coordinate of point M is (–3, 4).
(iv)Point S lies in the IV quadrant.
So quadrant IV contains all coordinates with positive x and negative y values.
Hence the coordinate of point S is (3, –4).