Question 102178
If given two points on a line you can find the slope of that line using this formula:
{{{m=(y[1]-y[2])/(x[1]-x[2])}}}
So we are given two points (6,6) and (5,6)
First thing we should notice is that these points have the same y coordinate.
So the line that contains these two points is a horizontal line. And horizontal lines always have a slope of zero.
Lets go ahead and put the points into the formula and see what happens.
{{{m=(y[1]-y[2])/(x[1]-x[2])}}}
{{{m=(6-6)/(6-5)}}}
{{{m=0/1}}}
{{{m=0}}}
Sure enough the slope is zero.