Mathematics for IGCSE & O level - Coordinate Geometry (Section 1 - No. 17)
Which of the following describes a line with a gradient of zero?
A vertical line.
A horizontal line.
A line sloping upwards from left to right.
A line sloping downwards from left to right.
ব্যাখ্যা
A horizontal line has no rise, therefore, the gradient is 0.