Question

If $(\frac{9}{2},6)$ lies on graph of 4x+ky = 12 then find value of k.

Answer 1

$x=\frac{9}{2}$ and y = 6 are on the line
$\therefore$ put these value in given equation
$4\left(\frac{9}{2}\right)$+k(6) = 12
18+6k = 12
6k = 12 -18
6k = -6
k = -1