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Verified answer
Y = 2x + 1Gradien = 2
Karena saling sejajar, maka gradien garis yang melalui (1,-2) = 2
Persamaan garis:
y - y1 = m(x - x1)
<=> y-(-2) = 2(x - 1)
<=> y + 2 = 2x - 2
<=> 2x - y - 2 - 2 = 0
<=> 2x - y - 4 = 0