Question

find the value of k for which (1,1)lies on the straight line x-2y=k

Answer 1

this is the answer for your question

Answer 2

x-2y = k is the equation of the line

The point (1,1) lies on the line hence it must satisfy the equation.

substituting x=1 and y=1 in equation of line

1-2(1)= k

-1=k

k= -1 is the required answer.


Hope this helps.