1.

Find k, if R (1, -1), S (-2, k) and slope of line RS is -2.

Answer»

R(x1 , y1 ) = R (1, -1), S (x2 , y2 ) = S (-2, k) 

Here, x1 = 1, x2 = -2, y1 = -1, y2 = k

Slope of lines RS = (y2 - y1)/(x2 - x1

= (k - (-1))/(-2 - 1) = (k + 1)/-3

But, slope of line RS is -2. … [Given] 

∴ -2 = (k + 1)/-3

∴ k + 1 = 6 

∴ k = 6 – 1 

∴ k = 5



Discussion

No Comment Found

Related InterviewSolutions