y = -1/4x + 2.
The slope equation is y = (m)x + b
(m)x equals the slope of the equation which is rise/run. Between the two points plotted, (0,2) and (4,1) you'd go down one and right 4 to get to (4,1). To go down or to the left means negative. This means the rise is -1. To go up or to the right means positive. This means the run is 4. Thus, the slope is 1/4.
The second part of the equation, b, is the y intercept. The line intercepts at (0,2) which is at the y axis, meaning b is 2.
