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Which statement is true?

A All vertical lines have a slope of zero.
B All vertical lines have a positive slope.
C All vertical lines have a negative slope.
D All vertical lines have an undefined slope.


Sagot :

D All vertical lines have an undefined slope.
A all vertical lines have a slope of zero
cuz the line will be parallel to the y-axis. also having a 0 slope means that the line will only be a straight line