Step-by-step explanation:
Zero slope - flat
Undefined slope - vertical
Positive slope - increases from left to right
Negative slope - decreases from let to right
A) Line D is flat, so the slope is 0
B) Line A is vertical, so the slope is undefined
C) Line C increases from left to right, so the slope is positive
D) Line B decreases from left to right, so the slope is negative
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Equations:
A: x = -8
B: y = - [tex]\frac{2}{7}[/tex]x + [tex]\frac{58}{7}[/tex] (line isnt clear, might be wrong)
C: y = [tex]\frac{1}{2}[/tex]x - 1
D: y = -6
