Question

if the graph 3x + ky =9, passes through the point (1,-2), find K.

Answer 1

3x + ky = 9

Putting the value of x = 1 and y = -2

3 x 1 + k (- 2) = 9
3 - 2k = 9
- 2k = 6
k = -3

Require value of k = -3

Hope This Helps You!

Answer 2

We basically have to substitute the values (1,-2) in the equation 3x+ky=9 to get the value of K. 

So let's do it.

Put x=1 and y=-2
3*1 + k*(-2)=9
3+ (-2k)=9
-2k=9-3
-2k=6
k= -3

Let's verify this by putting k= -3. If we get the value 9, that means our solution is correct. Putting k= -3, we get:

=3*1+ -3* -2
=3+6=9.                    {(- and - = + ) I.e. -3 * -2= 6}

So we get the answer as 9. Hence our solution is correct. 
K= -3.

Hope this helped. Please mark as brainliest.