Classify the following sets (i)Set of lines passing through a point.

Classify the following sets (ii)Set of lines passing through two given points.

Classify the following sets : Set of all concentric circles touching the x-axis at the origin.

Classify the following sets {x: x^2-2=0, x is rational}

Consider the line joing the points P(-4,1) and Q(0,5) Write the coordinate of the line passing through the midpoint of PQ.

Find the direction cosines of the line passing through the points (2,8,3) and (4,5,9).

Find the equation the following lines satisfying the given conditions. passing through the point (-4,3) with slope 1/2 .

Find the equation the following lines satisfying the given conditions. passing through the point (1,-1) and (3,5).

Find the equation the following lines satisfying the given conditions. passing through the point (-2,3) with slope -4.

Find the equation the following lines satisfying the given conditions. passing through the point (-1,1) and (2,-4).