Determine whether the equation or table defines y as a function of x. y Year Tuition

Determine whether the equation or table defines y as a function of x.

  ϰ                                     y
Year                        Tuition cost ($)
2016 ......................   10,900
2017 ......................   11,000
2018 ......................   11,200
2019 ......................   11,200
2020 ......................   11,300