Draw the graphs of the following straight-lines:

x = 4

x = 4

For different values of X and Y

Plotting above values in graph, we get

General equation for line is ay = bx +c

Here the line is, 0y=1x -4

Since ‘y’ is multiplied by zero every time, the value of ‘y’ does not affect the value of x or the equation.

⇒ For every value of y, the value of x will be constant, i.e. 4.