Question

1. an experimenter is testing the effects of drug y on blood pressure. which of the following would be the independent variable? a measurement of heart rate b measurement of blood pressure c amount of drug y

Explanation:

In an experiment, the independent variable is the factor that the experimenter manipulates. Here, the experimenter is testing the effects of drug Y on blood - pressure, so the amount of drug Y is what the experimenter can change. Heart rate measurement is not relevant to the drug - blood pressure relationship in this context, and blood pressure is the dependent variable (the outcome being measured).

Answer:

C. Amount of drug Y