Answer: Parabola
Step-by-step explanation:
The big curve line that is used to state the relationship between two functions is known as parabola. It is a plane curve with mirror symmetry and appears U shaped.
This part of the mathematics has various application in other fields as well. Parabolas have the property that they are made with the materials that reflects light.
This reflective property of parabola has made it useful for many of the practical applications.