Question

Draw the graph of the linear equation $x+y=7$ Verify from the graph that $(8,-1)$ is a solution of the given equation.

Answer 1

$x+y=7$

Points $(8,-1)$ lies on the line if and only if it satisfies the above equation.

Putting $x=8$ and $y=-1$ in the line equation we get,

$8-1=7⟹7=7$

Hence the points lies on the line.

Also from the graph it can be seen that points $(8,-1)$ lies on the line $x+y=7$.