The ratio in which the line segment PQ, where P (-5, 2) and Q (2, 3), is divided by the y-axis is
5:2
All points on Y-axis can be expressed as (0, y) where y is the y-coordinate of the point.
Therefore, let the point of intersection of Y-axis and line PQ be R(0, y).
Let the ratio in which the line segment PQ is divided by point R be k:1.
Applying section formula, we get
0=2k+1(−5)k+1
2k−5=0
k=52
∴ The required ratio is 5 : 2.