Men and women of different age groups who have cancer are randomly assigned to groups differing in the dose of a new cancer-fighting drug in order to examine the effects on the progression of the disease. the dependent variable is:

In the given case, the dependent variable is the progression of the disease.  

An independent variable refers to the variable, which is monitored or modified in a scientific examination to test the influences on the dependent variable. A dependent variable refers to the variable being examined and determined in a scientific test. Both the dependent and the independent variable may be witnessed in the terms of effect and cause.  

69 is the correct math for the amino acids