Question

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

Answer 1

Yes. For example `(x,y)=(1,3)` is a solution to this equation located in the first quadrant.

Explanation:

If an equation in `x` and `y` has a solution for which both `x > 0` and ``y > 0#
then it is at least partially contained within the first quadrant.

For all coordinates `(x,y)` in the first quadrant `x > 0` and `y > 0`