Question

Find the value of k for which the point (1, −2) lies on the graph of the linear equation x − 2y + k = 0.

Answer 1

We are given lies on the graph of linear equation.

So, the given co-ordinates are the solution of the equation.

Therefore, we can calculate the value of k by substituting the value of given co-ordinates in equation.

Substituting in equation, we get