Find the slope of the line passing through the points $(3, -2)$ and $(3, 4)$.

The equation of the line passing through the points $(-7, 8)$ and $(5, 2)$ is . . . . . . .

Find the equation of the line which passes through the point $(-4, 3)$ with slope $\frac{1}{2}$.

$A$ straight line passes through $P(1, 2)$ such that its intercept between the axes is bisected at $P$. Its equation is:

The line $lx + my + n = 0$ will be parallel to the $x$-axis,if

$A$ ray of light coming from the point $(2, 2\sqrt{3})$ is incident at an angle $30^{\circ}$ with the normal to the line $x=1$ at the point $A$. The ray gets reflected on the line $x=1$ and meets the $x$-axis at the point $B$. Then,the line $AB$ passes through the point