Find the equation of the line whose portion intercepted between the axes is bisected at the point (3, -2).
To Find: The equation of the line whose portion intercepted between the axes is bisected at the point (3, -2).
Formula used:
Let the equation of the line be
$\frac{x}{a}+\frac{y}{b}=1$
Since it is given that this equation, whose portion is intercepted between the axes is bisected i.e.; is divided into ratio $1: 1$.
Let $A(a, 0)$ and $B(0, b)$ be the points foring the coordinate axis.
$\Rightarrow a$ and $b$ are intercepts of $x$ and $y$-axis respectively.
By using mid-point formula $(\mathrm{m}: \mathrm{n}=1: 1)$
$(x, y)=\left(\frac{y_{1}+x_{1}}{2}, \frac{y_{2}+x_{2}}{2}\right)=\left(\frac{a}{2}, \frac{b}{2}\right)$
Since given point (3 , -2) divides coordinate axis in 1:1 ratio
(x , y) = (3 , -2)
$\Rightarrow \frac{a}{2}=3$ and $\frac{b}{2}=-2$
$a=6 b=-4$
equation of the line $: \frac{x}{a}+\frac{y}{b}=1$
$\frac{x}{6}+\frac{y}{-4}=1$
$-4 x+6 y=-24$
$-2 x+3 y=-12$
Hence the required equation of the line is $2 x-3 y=12$.