Graphs help us understand the relationship between two variables.
Vertex form: \(y=a(x-h)^2+k\)
- Vertex: \((h,k)\)
- Direction of opening is given by \(a\)
Arch:
- \(h=\dfrac{-6}{125}\left(x-25\right)^2+30\)
- \(h\) is the height (in metres)
- \(x\) is the horizontal distance from one end of the bridge (in metres)