Use the Slope Formula to Find the Slope $( - 2,9 ) \text { and } ( 2,9 )$

Multiple Choice

Use the slope formula to find the slope. (Hint: To learn the formula, write the complete formula each time you use it.) $( - 2,9 ) \text { and } ( 2,9 )$

A) 9
B) 0
C) 10
D) 8
E) undefined