If we look at the first half of the data we see a positive correlation (as water goes up, growth goes up), if we look at the last half of the data we see a negative correlation (as water goes up, grow...If we look at the first half of the data we see a positive correlation (as water goes up, growth goes up), if we look at the last half of the data we see a negative correlation (as water goes up, growth goes down), and if we look at all of the data we see no correlation.