Find the slope of the line that contains the following points.

slope is difference of the y-axis over difference of x-axis.
a. slope=
[tex] \frac{8 - ( - 12)}{17 - 17 } [/tex]
=infinity♾️ =tan 90°
b. slope=
[tex] \frac{ - 2 - 1}{ 6 - ( - 3)} [/tex]
= -3/9 = -1/3