Arch
By: Rebecca Burak
Arched Roof
The rafters at the Coppell Public Library are all parabolas in order to support the roof.
Close up picture with axes
Vertex and two other points
Green dots are the roots
Blue dot is vertex
Yellow is an outline of my parabola
Graph with Equations
Vertex Form and Standard form
Answers to the Questions
1. The spot/root where the rafter leaves the beam on the wall to support the roof.
2. The spot/root where our rafter hits the beam on the wall of the library.
3. One unit high
4. Five units, but unlike the water spout our vertex lies on the y-axis so it is at a distance of 0 units but 5 units from the root.
5. Domain: [-5, 5]
6. Range: [0, 1]