3. Coordinate Geometry
easy

अक्षों पर दूरी का उपयुक्त एकक लेकर नीचे सारणी में दिए गए बिन्दुओं को तल पर आलेखित कीजिए

$x$ $-2$ $-1$ $0$ $1$ $3$
$y$ $8$ $7$ $-1.25$ $3$ $-1$

Option A
Option B
Option C
Option D

Solution

The given points are $(-\,2,\,8),\,(-\,1,\,7),\,(0,\,-\,1.5),\,(1,\,3)$ and $(3,\,-\,1) .$ To plot these points :

$(i)$ We draw $X'OX$ and $YOY'$ as axes.

$(ii)$ We choose suitable units of distance on the axes.

$(iii)$ To plot $(-\,2,\,8),$ we start from $O ,$ take $(-\,2)$ units on $x$ -axis and then $(+8)$ units on $y$ – axis. We mark the point as $A \,(-\,2,\,8)$

$(iv)$ To plot $(-\,1,\,7),$ we start from $0 ;$ take $(-1)$ units on $x$ – axis and then $(+7)$ units on the $y$ axis. We mark the point as $B\, (-\,1,\,7)$

$(v)$ To plot $(0,\,-\,1.25)$ , we move along $1.25$ units below the $x$ – axis on the $y$ – axis and mark the point as $C \,(0,\,-\,1.25)$

$(vi)$ To plot $(1,\,3),$ we take $(+1)$ unit on the $x$ -axis and then $(+3)$ units on the $y$ – axis. We mark the point as $D\,(1,3)$

$(vii)$ To plot $(3,\,-\,1),$ we take $(+3)$ units on the $x$ -axis and then $(-1)$ unit on the $y$ – axis. We mark the point $E \,(3,\,-\,1)$

Standard 9
Mathematics

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