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Mapel MatematikaBab Persamaan Garis
Gambar menunjukkan garisnya melewati (2,0) dan (0,-4)
Gradiennya adalah
y2 - y1 / x2 - X1
= (-4 - 0) / (0 - 2)
= -4 / -2
= 2
Gradien yg tegak lurus, sifatnya m1 x m2 = -1
Maka,
2 x m2 = -1
m2 = -1/2 (A)