Question

Is the ordered our (-2,8) a solution to: y-9=3x

Answer 1

It is not a solution

1) To get to know that, we need to plug it in the equation and check whether it is true or false.

2) Picking point (-2,8) and plugging -2 into x and 8 into y, we get:

$\begin{gathered} y-9=3x \\ (8)-9=3(-2) \\ -1=-6\:False \end{gathered}$

2) Hence, we can tell that (-2,8) is not a solution to that equation