First you do rise over run meaning you from the point (-2,2) you rise up 2 to reach the x axis which is where point -6,0 so you rise 2 points and run 6. since the line is negative it becomes -1/4 and y-intercept is where the line first touches the y-line which is -1.5. I hop this helps!
6 7/8= 55/8 6 1/6= 7/6 first find common denominators 55/8 * 3= 165/24 7/6 * 4= 28/24 165/24 divided by 28/24 is the same as 165/24 time 24/28 so that equals 3960/672 which equals 5.8928 so estimates about 5 shelves<span />
