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tp kalo bukan mungkin gini :
2y + 2 = -7/4u -47/4
2y = -7/4u - 47/4 + 2
2y= -7/4u - 47/4 + 8/4
2y = -7/4u - 56/4
2y = -7/4u -14 <-------------- di kalikan 4
menjadi
8y = -7u - 56 atau 8y + 7u = -56
maka gradiennya
m = -7/8