Answer:
y = -3x -1
Step-by-step explanation:
To find equation first find slope:
where (x1, y1) and (x2, y2) are points
Take two points which the line cross through: (0, -1), (1, -4)

Now find equation:
y - y1 = m(x - x1) where m is the slope
y -(-1) = -3(x - 0)
y + 1 = -3x
y = -3x -1