Position-Ratio of Point/Examples/R Midway between P and Q

Example of Position-Ratio of Point
Let $P$ and $Q$ be points.

Let $R$ be a point on the straight line passing through $P$ and $Q$.

Let $k$ denote the position-ratio of $R$.

When $R$ is on the midpoint of the line segment $PQ$, $k = +1$.

This is the centroid of $P$ and $Q$.


 * Position-ratios-examples.png