Question:
A line is drawn through the point $(1,2)$ to meet the coordinate axes at $P$ and $Q$ such that it forms a triangle $\mathrm{OPQ}$, where $\mathrm{O}$ is the origin. If the area of the triangle $\mathrm{OPQ}$ is least, then the slope of the line $P Q$ is :
Correct Option: , 4
Solution:
Let the equationof line be $\frac{x}{a}+\frac{y}{b}=1$
It passes through $(1,2)$
