The slope of a line parallel to the line passing through the points A(3, –7) and B(5, –7) is:
2
1
–1
0
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Two non-vertical lines with slopes m1 and m2 are parallel to each other, if:
m1m2 = 1
m1m2 = –1
m1 = –m2
m1 = m2
Two non-vertical lines with slopes m1 and m2 are perpendicular to each other, if:
m1.m2 = 1
m1.m2 = –1