well, let's take two points off of it, hmmm say -8, 2 and hmmm 7, 2, and get the slope
[tex]\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&&(~ -8 &,& 2~)
% (c,d)
&&(~ 7 &,& 2~)
\end{array}
\\\\\\
% slope = m
slope = m\implies
\cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{2-2}{7-(-8)}\implies \cfrac{2-2}{7+8}\implies \cfrac{0}{15}\implies 0[/tex]
