Review the experimental question and hypothesis. which statement best explains why the hypothesis is testable? question: how does the amount of water individuals drink everyday affect the number of facial blemishes they receive every month? hypothesis: if the amount of water people drink everyday affects the concentration of certain hormones in their blood, then increasing the amount of water consumed daily will decrease the number of facial blemishes they receive each month. the hypothesis includes both an independent variable and a dependent variable. the hypothesis is written using an "if …, then …" format. the hypothesis includes an explanation and makes a prediction. the hypothesis can be used to accurately explain observable facts.