how to find the slope of a line example?
['The slant of a line is called the slope. Slope describes how steep a line is. ... ', 'For example: Given two points, P = (0, –1) and Q = (4,1), on the line we can calculate the slope of the line.', 'For example: Consider the two points, R(–2, 3) and S(0, –1) on the line. What would be the slope of the line?']