Question 68451
Find the slope of the line through the following pairs of points.

(-5, -3) and (-5,2)
This is a special case.  Notice that the x values of both points (x,y) is -5.  If we were to plot the points and connect them, we would have a vertical line going through x=-5.  Vertical lines have undefined slopes.
If you tried to find it using the slope formula this is what happens:
{{{highlight(m=(y[2]-y[1])/(x[2]-x[1]))}}}, m=slope, (x1,y1) and (x2,y2) are the given points.
In this case, (x1,y1)=(-5,-3) and (x2,y2)=(-5,2)
{{{m=(2-(-3))/(-5-(-5))}}}
{{{m=(2+3)/(-5+5)}}}
{{{m=5/0}}} <---this is undefined, you can't divide by 0.
Happy Calculating!!!