What is the independent variable shown on this graph?


Only temperature (°C) is the independent variable.

Only temperature left parenthesis degree Celsius right parenthesis is the independent variable.,

Both flow time (s) and temperature (°C) are independent variables.

Both flow time left parenthesis lowercase s right parenthesis and temperature left parenthesis degree Celsius right parenthesis are independent variables.,

Only flow time (s) is the independent variable.