Question

is the graph of this equation a horizontal or vertical line? x = -20 horizontal line vertical line

Explanation:

Step1: Recall line - equation rules

In the coordinate - plane, the equation of a vertical line is of the form $x = a$, where $a$ is a constant. The equation of a horizontal line is of the form $y = b$, where $b$ is a constant.

Step2: Analyze the given equation

The given equation is $x=-20$. Here, for any value of $y$, $x$ is always equal to $- 20$. This means that the set of points $(x,y)$ that satisfy the equation form a vertical line.

Answer:

vertical line