Answer:
Independent Variable #1: The weight of the lifeguard
Dependent Variable #1: The life jackets
Independent Variable #2: The person
Dependent Variable #2: The gum flavors
Step-by-step explanation:
Independent Variable is what stands alone, or doesn't change. In the question for #1 it never says if they changed the weight.
Dependent Variable cannot stand alone, or the outcome. So without the weight of the life guard then you can't test each life vest, and your outcome is which life vest works best.
Same thing for the independent Variable for #2, the person does not change.
The gum flavors is your dependent variable because thats what's changing, and without the person to test, then how will they know which gum keeps its flavor the longest?
Hope this helps!! :)