rise run ∆ ∆ y2 –y1 x2 –x1

+
-
rise
Slope = run y2 – y 1
∆𝒚
=
m
=
x2 – x1
∆𝒙
positive
𝑼𝑷+
𝑹𝑰𝑮𝑯𝑻+
𝑫𝑶𝑾𝑵 −
OR
𝑳𝑬𝑭𝑻−
negative
𝑼𝑷+
𝑳𝑬𝑭𝑻−
𝑫𝑶𝑾𝑵 −
OR
𝑹𝑰𝑮𝑯𝑻+
undefined
𝑼𝑷+
𝟎
𝟎
𝑳𝑬𝑭𝑻−
𝑫𝑶𝑾𝑵 −
OR
𝟎
zero
OR
𝟎
𝑹𝑰𝑮𝑯𝑻+
+