The document discusses different methods to find the equation of a straight line. It provides examples of finding the equation when given: 1) Two points that the line passes through. 2) A point and the slope of the line. 3) The x-intercept and y-intercept. 4) When the x-intercept and y-intercept are equal. 5) When given the y-intercept and slope. Worked examples are provided for each method.