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rumus gradien: y1-y2/x1-x2
gradien g: 1-5/ 7-1 = -4/6 = -2/3
atau cara gampang tinggal hitung byk titik garis y dan x. trs masukin ke rumus:
-y/x
= - atas
mendatar
= - 4/6
= - 2/3