Connecting Algebra and Geometry Through Coordinates

1) Video to find Intersecting Point(s) with Undefined and 0 Slope

2) Video to find Intersecting Point(s) with 2 equations
(This video talks about midpoint but systems of equations was used)

3) Video to find Intersecting Point(s) between a Vertical line and an equation in slope intercept form
(I made a mistake but I cleaned it up)

4) Video to find Intersecting Point(s) between a Vertical line and an Equation in Slope Intercept Form

5) Intersection point between two equations with a fraction slope and y-intercept
(This one is a little detailed, make sure you pay attention if you come across this issue)

6) Checking Intersection points 

Extra Credit 

Proving Intersection Point(s) between a Quadrilateral and a Straight Line 

Potential 2D to 3D software ( I do not know how well they work, but if you have experience with other types of software please let me know). Play around with Geogebra, it has a 3-D option.

OpenSCAD 

Make3D