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dari ujung kiri atas ke bawah ada 4 kotak
dari kiri kekanan ada 6 kotak
Gradien garis gunakan tan α
Tan α = -4/6
= -2/3 (C)
No. 21
x - 2y = -6
memmotong sumbu y → x = 0
0 - 2y = -6
-2y = -6
y = -6/-2
y = 3
memotong sumbu x → y = 0
x - 2(0) = -6
x = -6
titiknya (0, 3) dan (-6, 0)
(A)