Answer:
7. Independent: people in living in the home
Dependent: average electric bill
8. I: days that pass
D: weight of potato
9. I: different lengths
D: average time it takes...
10. I: brand of food
D: weight
11. I: environment temp
D: animal body temp
12. I: soil type
D: how much water it retains
Step-by-step explanation:
Independent variable is something controlled in experiments to see what will happen, and that results in a dependent variable. I'll use the example of number 7, people in the house is dependent, the average price of the electric bill depends on how many people are in the house. Dependent variable depends on the controlled independent variable, hence dependent variable.