Recall that slope is rise over run, or
change in y over change in x.First, let's take out y values in order. We have 10 and -6. To get from 10 to -6, you need to subtract 16, which gives us our numerator.
Now, let's take our x values in order. We have -3 and -13. To get from -3 to -13, you need to subtract ten.
Now we have our slope, which is

. If we simplify this,
our final answer is
.