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m1 = -4/7
m1 × m2 = -1
-4/7 × m2 = -1
m2 = -1/-4/7
m2 = -1 × -7/4
m2 = 7/4
y - y1 = m(x - x1)
y - 1 = 7/4(x - (-2))
y - 1 = 7/4(x + 2)
4(y - 1) = 7(x + 2)
4y - 4 = 7x + 14
4y - 7x = 14 + 4
4y - 7x = 18