Step 1 :Identify the two quantities in the scenario: time and heart rate.
Step 2 :Identify the independent variable: Time is the independent variable because it is not dependent on any other variable in the scenario. It progresses forward regardless of what Jane's heart rate is.
Step 3 :Identify the dependent variable: Jane's heart rate is the dependent variable because it changes based on the amount of time she has been exercising.
Step 4 :Final Answer: The two quantities in the scenario are time and heart rate. Time is the independent variable and heart rate is the dependent variable.