Test: the relationship of amount of salt added and the chewiness of the noodles

Test: the relationship of amount of salt added and the chewiness of the noodles Hypothesis: More salt added when making the noodles, chewier the noodles is tasted. Independent variable: amount of salt added Dependent variable: chewiness (we convert the test of chewiness into the test of length changed when the noodles is hanged and stretched due to the gravity after being heating) Controlled variables: amount of water amount of alkaline amount of flour ...