👉 Learn how to find the rate of change from a graph. The rate of change is the rate at which y-values are changing with respect to the change in x-values. To determine the rate of change from a graph ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.

👉 Learn all about the slope of a line. The slope of a line is the steepness of the line. The horizontal line has a zero slope while the vertical line has an undefined slope. To determine the slope of ...