the question is:

part of a roller coaster is modeled by three parabola - some parts removed to give the diagram below.

The first parabola from the left meets the second at co-ordinates (7, 14). using this information from the diagram how can i find the formula associated with each parabola and also workout their relevant domains? hint: think of the 3rd parabola is a translation of the first.

could someone explain in steps if possible how the formulaes and the domains be obtained?