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#semogamembantuya
(y1 - y2) / (x1 - x2) atau
(y2 - y1) / (x2 - x1)
Jadi
(y1 - y2) / (x1 - x2) = m
(-4 - 1)/(3+7)= m
(-5)/10 = m
m = - 1/2