What are the slope, y-intercept, and equation of the line passing through the points (-1,1.2) and (3,-2)?

a. slope = -0.8, y-intercept = 0.4, y = -0.8x+0.4
b. slope = 0.8, y-intercept = 0.4, y = 0.8x+0.4
c. slope = -0.8, y-intercept = 1.5, y = -0.8x+1.5
d. slope = -1.25, y-intercept = 0.05, y = -1.25x+0.05

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