The graph of the equation $3x = 10$ is parallel to which axis?

If $(2, -3)$ is a solution of the equation $3x + ky = 18$,find the value of $k$.

State whether the following statement is True or False and justify your answer:
Every point on the graph of a linear equation in two variables does not represent a solution of the linear equation.

Write the following equation in the standard form $ax + by + c = 0$ and indicate the values of $a, b,$ and $c$ in each case:
$0.2x + 0.5y = 1.2$

Solve the equation $2y + 1 = y + 4$ and represent the solution$(s)$ on $(1)$ the number line $(2)$ the Cartesian plane.

If the point $(2, 3)$ lies on the graph of the equation $3x + ay = 18$,find the value of $a$.