• gradient is the steepness and direction of a line as read from left to right.
• the gradient or slope can be found by determining the ratio of
the rise (vertical change) to the run (horizontal change)
between two points on the line, or by using
a linear equation in slope-intercept form (y = mx + b).
• a positive gradient indicates the line is heading up.
• a negative gradient indicates the line is heading down.
• the gradient of a horizontal line is zero.
• the gradient of a vertical line