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m = (y2 -y1) / (x2 - x1)
7)
m1 = (9 - 5) / (4 - 2)
m1 = 4 / 2
m1 = 2
m2 = (2 - 4) / (3 - (-1))
m2 = -2 / (3 + 1)
m2 = -2 / 4
m2 = -1/2
TEGAK LURUS
8)
m1 = (2 -(-5)) / (-1 -(-3))
m1 = (2 + 5) / (-1 + 3)
m1 = 7 / 2
m2 = (2 - 4) / (7 - 0)
m2 = -2 / 7
TEGAK LURUS
9)
m1 = (-1 -(-2)) / (3 - 4)
m1 = (-1 + 2) / -1
m1 = 1 / -1
m1 = -1
m2 = (-16 -(-1)) / (-10 -(-5))
m2 = (-16 + 1) / (-10 + 5)
m2 = -15 / -5
m2 = 15 / 5
m2 = 3
TIDAK KEDUANYA
10)
m1 = (3 - 0) / (2 - 0)
m1 = 3/2
m2 = (-2 -5) / (0 -(-2))
m2 = (-7) / (0 + 2)
m2 = -7 / 2
TIDAK KEDUANYA
11)
m1 = (9 - 3) / (5 - 5)
m1 = 6 / 0
tidak terdefinisi, maka tak ada kemiringan. karena x tetap, maka garis sejajar sumbu y
m2 = (2 - 2) / (0 - 4)
m2 = 0 / -4
m2 = 0
kemiringan 0 dan sejajar sumbu x
GARIS TEGAK LURUS
12)
m1 = (5 - 5) / (2 - 3)
m1 = 0 / -1
m1 = 0
m2 = (4 - 4) / (0 - 2)
m2 = 0 / -2
m2 = 0
SEJAJAR