Line graphs that indicate time along the X axis can be used to predict what would happen to the dependent variable‘s in an experiment at a later point in time A. Only if the existing line shows an upward trend
B. Only if the existing line shows an downward trend
C. If a new variable was introduced to the experiment
D. If the experiment continued under the same conditions

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed