Any solution of the linear equation $2x + 0y + 9 = 0$ in two variables is of the form:

Any point on the $y$-axis is of the form

If the point $(-2, 5)$ lies on the graph of the equation $ax + 3y = 7$,find the value of $a$.

In a Cartesian plane,the graph of the equation $y=5$ is parallel to the ........ axis.

Draw the graph of the following linear equation in two variables:
$4x - 3y = 12$

The work done by a body on application of a constant force is the product of the constant force and the distance travelled by the body in the direction of force. Express this in the form of a linear equation in two variables and draw its graph by taking the constant force as $3$ units. What is the work done when the distance travelled is $2$ units? Verify it by plotting the graph.