you will take in two points in the xy-plane from a user: call those points (x1, y1) and (x2, y2). Recall that if a line is vertical, its equation is of the form x = a for some real number a. Non-vertical lines have the form y = mx + b where m is the slope of the line, and b is the y-intercept. Recall further that (for non-vertical lines), the slope of a line is given by m = y2 − y1 / x2 − x1 . Your program should output the equation of the line through the user’s points, and then output whether it’s horizontal, vertical, increasing, or decreasing