Which of the following lines is perpendicular to the x-axis?Responses

Question

y=1
y is equal to 1

y=x
y is equal to x

x=1
x is equal to 1

x=−y

Answer 1

A line that is perpendicular to the x-axis must be a vertical line.

The equation that represents a vertical line is of the form \( x = k \), where \( k \) is a constant. In this case, the option that meets this criterion is:

x = 1

Thus, the line \( x = 1 \) is perpendicular to the x-axis.