GMAT TIGER wrote:
Which of the following coordinates are on the line segment connecting (5,6) and (21,18)?
pls advice the formulae used here..
use slope formula = (21 - 6)/(21-5) = 3/4
try to get the same slope = (9-6)/(9-5) = 3/4
Note: It might happen sometime that the slope might be same for a point but point might not fall on the line segment. For a point (x, y) to be on line segment formed by (x1, y1) and (x2, y2), apart from having same slope, the point also needs to have x between x1 and x2 and y between y1 and y2.