# Thread: Am i doing these linear inequalituies in two varibles correctly?

1. ## Am i doing these linear inequalituies in two varibles correctly?

I am not sure when to use test points on some of these.

2. ## Re: Am i doing these linear inequalituies in two varibles correctly?

Originally Posted by cytotoxictcell
I am not sure when to use test points on some of these.
First surely it is $\displaystyle 3x-y<3$ and not $\displaystyle 3y-y<3$.

If the line does not contain $\displaystyle (0,0)$, then that is the easiest point to use.

Also in the case of strict inequality, $\displaystyle <~,$ use a dashed line.