SA3 marksYear: 2020MediumCBSE Class 10
coordinate-geometrysection-formulay-axis-division
Question
Find the ratio in which the y-axis divides the line segment joining the points (6,−4) and (−2,−7). Also find the point of intersection.
Solution
1
Let the point P(0,y) on y-axis divide the line segment AB in the ratio K:1. Using section formula: 0=K+1−2K+6
+1 mark2
⇒−2K+6=0⇒K=3. Ratio is 3:1.
+1 mark3
y=3+13(−7)+1(−4)=4−25. Point of intersection is (0,4−25).
+1 mark