# For the equation, y=-x+4, does the graph pass through the first quadrant?

Mar 26, 2016

Yes. For example $\left(x , y\right) = \left(1 , 3\right)$ is a solution to this equation located in the first quadrant.
If an equation in $x$ and $y$ has a solution for which both $x > 0$ and  y > 0#
For all coordinates $\left(x , y\right)$ in the first quadrant $x > 0$ and $y > 0$