the temperature of a solution can change the solubility of a substance. The chart shows solubility of the same solute at different temperatures in water.
W: temp- 40 | 100g water- 50
X: temp- 59 | 100g water- 200
Y: temp- 55 | 100g water- 150
Z: temp- 48 | 100g water- 80


Based on the chart, which solution was at the optimal temperature to allow the greatest solubility?
W
X
Y
Z
(Also, i know the answer is not Y)