The equation of the line perpendicular to the line $ax + by + c = 0$ and passing through $(a, b)$ is:

If $B$ is the reflection of the point $A(1, 2)$ with respect to the line $y = x$ and $(\alpha, \beta)$ is the reflection of $B$ with respect to $y = 0$,then-

If the family of straight lines $ax + by + c = 0$,where $2a + 3b = 4c$,is concurrent at the point $P(l, m)$,then the foot of the perpendicular drawn from $P$ to the line $x + y + 1 = 0$ is

Find the equation of the line perpendicular to the line $ax + by + c = 0$ and passing through the point $(a, b)$.

The equation of the perpendicular bisector of the line segment joining the points $(7, 4)$ and $(-1, -2)$ is:

What are the coordinates of the image of the point $(4, -5)$ with respect to the line $y = x$?