Question 132019
Find ANY two points on the graph. It doesn't matter which points you use, or which direction you go, as long as they are two distinct points on the line. Then measure the vertical and horizontal distances between the two points. Remember, then that slope is the VERTICAL distance divided by the HORIZONTAL distance. If the line is going UPHILL (up on the right side!), then the slope is positive. If the line is going DOWNHILL (down on the right side!), then the slope is negative. 

R^2