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