Write whether the following statement is True or False ? Justify your answers : The graph of every linear equation in two variables need not be a line.

Write whether the following statement is True or False ? Justify your answers : Every point on the graph of a linear equation in two variables does not represent a solution of the linear equation.

Write whether the following statement is True or False ? Justify your answers : The graph represents the linear equation x + y = 0.

Write whether the following statement is True or False ? Justify your answers : The graph of the linear equation x+2y=7 passes through the point (0, 7).

Write whether the following statement is True or False ? Justify your answer : Point (3, 0) lies in the first quadrant.

Write whether the following statement is True or False ? Justify your answer : (- 1, 7) is a point in the II quadrant.

Write whether the following statement is True or False ? Justify your answers : The point (0, 3) lies on the graph of the linear equation 3x + 4y = 12 .

State whether the following statement is true or false, and justify your answers. Not all integers are rational.

State whether the following statements are true or false. Justify your answer. : Some real numbers are irrational.

Whether the following statement is true ? Justify your answer. Every set has a proper subset.

State whether the following statements are true or false. Justify your answer. : Some polygons are pentagons.