The slope of a straight line describes the lines angle of steepness from the horizontal whether it rises or falls. Y y 1 m x x 1 The equation is useful when we know. Another way to express the equation of a straight line.
And m represents the slope of the line.
Y 4 x 2. Y 5 3x - 2. The slope is calculated by counting the rise and then counting the run. To write an equation in point-slope form given a graph of that equation first determine the slope by picking two points.