Point K and F
Looking at the data, you can see that most of the data points form close to a line- if you were to draw a line of best fit through the data, you would see that it would be quite close to most points on the graph. This is the trend of the graph, it is linear.
However, you can see thaf K and F do not come close to this trend at all and are therefore outliers since they do not fall close to the line.