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gradien nya adalah 2Y=-x+5
Y = -1/2x + 5
gradien = -1/2x
karerna tegak lurus jadi gradien dibalik menjadi =+2
masukan ke dlm rumus y-y1 = m (x-x1)
y-3 = 2 (x- (-2)
y-3 = 2x+4
y = 2x+7 (A)