in an expirement, shara feeds her rat differnt brands of rat foods

Chemistry
Tutor: None Selected Time limit: 1 Day

(brands x,yandz) each for 2 weeks and weights the rat over several days during the period of each diet. What is the independent variable?

the brand of food that shara feeds the rat

the amount of water that the rat gets in each period 

the rats change in weigh during the period

Sep 13th, 2015

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the brand of food that shara feeds the rat

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Sep 13th, 2015

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Sep 13th, 2015
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Sep 13th, 2015
May 24th, 2017
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