The pointer is 4 of the smallest units above 2. There are 16 of those small units. Each 2 of those units is 1/8 pound, so when the pointer is on a multiple of 2 units, it is on a multiple of 1/8 pound. No guesswork is required to choose the correct weight to the nearest 1/8 pound.
2 4/16 = 2 1/4 lb . . . . the scale reading to the nearest 1/8 pound.
1) m = y2 - y1/x2 - x1 y = mx + b m = 7 - 0/3 - 8 y = -7/5x + 11.2 2) y= -7/5x + 12 (the slope or m stays the same because the two equations are parallel)
