Question

is the graph of this equation a horizontal or vertical line?
x = 4
horizontal line vertical line

Explanation:

Step1: Recall line equation types

Horizontal lines have equations of the form \( y = k \) (constant \( y \)-value, varying \( x \)). Vertical lines have equations of the form \( x = k \) (constant \( x \)-value, varying \( y \)).

Step2: Analyze \( x = 4 \)

The equation \( x = 4 \) has a constant \( x \)-value (4) and \( y \) can be any real number. This matches the form of a vertical line.

Answer:

vertical line