Question

The graph for the linear equation given below $y=4$.

Answer 1

In the linear equation $y=4$, there is no term for $x$. This
means, that $x$ can take any value. Points lying on the line $y=4$
can be $(0,4),(-5,4)$ or $(2,4)$.
Plotting these points on
the graph paper and joining them, we get the graph for $y=4$.