If $b =$ in the equation $a x + b y + c = 0$ where $a, b$ and $c$ are constants, then the line represented by the equation is parallel to Y-axis.

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Solution

The correct option is C 0
Consider the general form of a linear equation in two variables $a x + b y + c = 0.$
If $b = 0,$ then $a x + c = 0.$
$⟹ x = - \frac{c}{a}$
Thus, for any value of $y,$ the value of $x$ will remain unchanged as shown in the graph below.

$⟹ x = - \frac{c}{a}$ is a line parallel to Y-axis.

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