The slope of a horizontal line is

A) negative.
B) zero.
C) continually changing.
D) infinite.

Horizontal Line

A straight line that has a constant y-coordinate for all its points, indicating it is parallel to the x-axis.

Slope

The measure of steepness or incline of a line, indicating the rate of change between two variables.

Continually Changing

Describes a state of constant evolution or modification, not remaining static.