Answer
Two possible equations are $y=5$ and $y=x$.
Domain of $y=5$: all real numbers
Range of $y=5$: the number 5
Domain of $y=x$: all positive integers
Range of $y=x$: all positive integers
Work Step by Step
The first five data points have y values that are close to 5. The last five data points have y values close to their respective values of x.