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B. gradien = 1/2
C. gradien = 1/5
D. gradien = 2
*maaf kalo salah
b) y+5 = 1/2x-4
y = 1/2x-4-5
y = 1/2x-9
jadi, m = 1/2
c) x-5y = 8
a = 1, b = -5
jadi,
m = -a/b = -1/-5 = 1/5
d) m = y2-y1 / x2-x1
= 4-2 / 2-1
= 2/1
= 2