Simple.....
using [tex] \frac{ y_{1}- y_{2} }{ x_{1}- x_{2} } [/tex]
--->>>
Take any of the points on the line-->> (0,0) and (15,5)
[tex] \frac{0-5}{0-15} = \frac{-5}{-15} = \frac{1}{3} [/tex]
This is your slope-->>[tex] \frac{1}{3} [/tex]
To check it..go one up then three over...does it hit the coordinates? Yes.
Thus, your answer, D.
