Fill in the blanks:
(i) Abscissa of point (2, -5) is .....................
(ii) Ordinate of point (0, -3) is .....................
(iii) Coordinate of a point on x-axis is .....................
(iv) Coordinate of a point on y-axis is .....................
(v) Point (2, –3) lies in .............. quadrant.
Answer (1)
To understand this question, we need to know some basic concepts about the coordinate plane, also known as the Cartesian plane. The plane is divided into four quadrants by a horizontal line, called the x-axis, and a vertical line, called the y-axis. Each point on this plane is denoted by a pair of numbers written in parentheses, like (x, y), where x is the abscissa and y is the ordinate.
Let's fill in the blanks:
Abscissa of point (2, -5) is 2.
The abscissa is the x-coordinate of a point. In the point (2, -5), the x-coordinate is 2.
Ordinate of point (0, -3) is -3.
The ordinate is the y-coordinate of a point. In the point (0, -3), the y-coordinate is -3.
Coordinate of a point on the x-axis is (x, 0).
A point on the x-axis has a y-coordinate of 0. This means the ordinate is 0, so the point is of the form (x, 0).
Coordinate of a point on the y-axis is (0, y).
A point on the y-axis has an x-coordinate of 0. This means the abscissa is 0, so the point is of the form (0, y).
Point (2, –3) lies in Quadrant IV.
The coordinate (2, -3) has a positive x-value and a negative y-value. Points with positive x and negative y are located in Quadrant IV of the coordinate plane.
