# Summary

*ax*+

*by*+

*c*= 0.

- Solution means a pair of values, one for
*x*and other for*y*; where the values substituted in the given equation makes the two sides of the equation equal.

Â - A linear equation in two variables has infinitely many solutions.

- The geometrical representation of
*ax*+*by*+*c*= 0 is a straight line.

*Â Â x*= 0 is the equation of the*y*â€“ axis.

*y*= 0 is the equation of the*x*- axis.

- In a graph
*x*=*k*is a straight line parallel to the*y*â€“ axis.

- In a graph
*y*=*k*is a straight line parallel to the*x*â€“ axis.

- The type of equation
*y*=*mx*represents a line passing through the origin.