An office building is built in the shape of a four-sided pyramid. It stands 820 feet tall and is 180 feet wide at its base.
Imagine that a coordinate grid is placed over a side of the
building. In the coordinate grid, each unit represents one
foot. Enter an absolute value function whose graph is the V-
shaped outline of the sides of the building. Take one corner
of the building to be the origin of the coordinate grid and
express your answer using improper fractions in simplest
form where needed.