What is the equation of the line, in slope-intercept form, that contains the points (-1, 4) and (2,1)

The generic equation of the line is:
 y-yo = m (x-xo)
 Where, the slope is:
 m = (y2-y1) / (x2-x1)
 m = (1-4) / (2 - (- 1))
 m = (1-4) / (2 - (- 1))
 m = (- 3) / (3)
 m = -1
 We choose an ordered pair:
 (xo, yo) = (- 1, 4)
 Substituting values:
 y-4 = -1 (x + 1)
 Rewriting:
 y = - x - 1 +4
 y = -x + 3
 
 The equation of the line, in slope-intercept form, that contains the points (-1, 4) And (2,1) is:
 y = -x + 3