Question

A student is investigating the question “Which increases a person’s breathing rate more after three minutes, lifting five-pound weights or lifting ten-pound weights?” She designs an experiment to test the question. Which statement most likely describes the dependent variable in her experiment? The breathing rate is the dependent variable because it can be affected by varying weights. She cannot measure the dependent variable until she finishes the experiment. The time of exercising is the dependent variable because it can be measured. The five- and ten-pound weights are the dependent variable because they can affect the breathing rate.

Answer 1

A. The breathing rate is the dependent variable because it can be effected by varying weights. 

Independent variables are what you control during the experiment, so in this case it would be the weight of the weights. The dependent variable is the variable that chages in response to the indeoendent variable, so in this case the breathing rate. The amount of time exercising would be a constant because it's not changing; it's ten minutes in each trial. If you can't measure the dependent variable then you aren't setting up the experiment correctly. 

Answer 2

Answer:

a

Explanation:

for the people that speed run