Question

findthe value ok k if(1,-1) is the solution of equation 3x-ky=8.also find the coordinates of another point lying on this graph​

Answer 1

Answer:

Step-by-step explanatas we the value of x and y putting them in quation x=1, y=-1

3×1-k×-1=8

3+k=8

K=8-3=5

K=5

Answer 2

$k=5$

Another point also line on graph                      $Q(0,-8/5)$

Step-by-step explanation:

Given,

$f\left ( x \right )=3x-ky=8$

$p(1,-1)$

Find the value of k at         $p(1,-1)$

Solution,

$f\left ( x \right )=3x-ky=8$

$3\times 1-k\times -1=8$

$3+k=8$

$k=8-3$

$k=5$

To find coordinates of another point lying on graph

$Let$ $x=0$ and find y coordinates

$3\times 0-\left ( 5 \right )\times y=8$

$-5y=8$

$y=-8/5$

Coordinates

$Q(0,-8/5)$   we can find many coordinates point lying on this graph