Find the slope, if it exists, of the line containing the pair of points.

Question

(-19, -7) and (-20, -8)

Select the correct choice below and if necessary, type out the answer to complete your choice.

(a) The slope is ?

(b) The slope is undefined.

Answer 1

The slope formula is m=(Y2-Y1)/(X2-X1), simply plug in the values:

m=(-8- -7)/(-20- -19)