Lines Curves

Question 1
   
A
Pa and Pb are adjacent to each other with respect to their x-coordinate
B
Either Pa or Pb has the largest or the smallest y-coordinate among all the points
C
The difference between x-coordinates Pa and Pb is minimum
D
None of the above
       Engineering Mathematics        Lines Curves       Gate 2007-IT
Question 1 Explanation: 
Draw the line from the first to third point, and look at whether the middle point is above, at or below it. If the middle point is on the line, all slopes are equal. If the middle point is above the line, then the slope from the first to the second point is the highest. If the middle point is below the line, then the slope from the middle point to the second is highest. In any case, you can find a greater slope betweem two adjacent points.
There is 1 question to complete.