Ordered pairs — lesson. Mathematics State Board, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Let us draw a point in the graph. The point is denoted by

$(a,b)$ , where

$a$ is the distance along the

$X$ - axis and

$b$ is the distance along the

$Y$ - axis. This pair

$(a,b)$ is called as the ordered pair. The ordered pair helps us identify the point correctly.

The

$x$ - coordinate in the ordered pair is called abscissa and the

$y$ - coordinate in the ordered pair is called ordinate.

Here, the ordered pair is

$(a,b)$ , where

$a$ is the

$x$ - coordinate or the abscissa, and

$b$ is the

$y$ - coordinate or the ordinate.

Example:

Let us draw a point in the graph and name it as

$A$ . Here, the ordered pair is

$(2,5)$ .

The

$x$ - coordinate or the abscissa of the ordered pair is

$2$ units, and the

$y$ - coordinate or the ordinate is

$5$ units.

Important!

The ordered pair

$(a,b)$ and

$(b,a)$ is not the same.

Did you find an error?

5. Ordered pairs