Me i really need and its do tomorrow

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.

How do u write a function for the reflection across the y axis