If ` 3a + 2b + 6c = 0 ` the family of straight lines `ax+by +c = 0 ` passes through a fixed point . Find the coordinates of fixed point .

If the straight line y = mx +c passes through the points (2,4) and (-3,6) , find the values of m and c .

If a, b and c are in AP then the straight lines ax+by+ c =0 will always pass through. …..... .

Find the equation of the straight line which passes through the point (1, - 2) and cuts off equal intercepts from axes.

A ray of light passing through the point (1,2) reflects on the X -axis at point A and the reflected ray passes through the point (5,3) . Find the coordinates of A.

Show that the curve for which the normal at every point passes through a fixed point is a circle.

IF a circle passes through the point (0,0) (a,0),(0,b) then find the coordinates of its centre. Thinking process :

In a plane there are 37 straight lines, of which 13 pass pass through the point B. Besides, no three lines passes both points A and B and no two are parallel, then the line passes through both points A and B and number of intersection points the lines have, is

Find the slope of the line passing through the given two point (a, 0) and (0, b)

Find the slope of the lines : (c) Passing through the points (3, - 2) and (3, 4),