Answer:
D) -2
Explanation:
Slope = -3
(1, -9)
y - y1 = m(x - x1)
y + 9 = -3(x - 1)
y + 9 = -3x + 3
y = -3x - 6
0 = -3x - 6
6 = -3x
x = -2
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