Define the following words: - experiment - variable - independent variable - dependent variable - control variable - purpose

Experiment- a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact

Variable: an element, feature, or factor that is liable to vary or change

Independent variable- a variable (often denoted by x) whose variation does not depend on that of another.

dependent variable-a variable (often denoted by y) whose value depends on that of another.

Controlled variable- A variable that you can change

Purpose- the reason for which something is done or created or for which something exists

The option that best explains why in this excerpt from Jackie Robinson's letter to President Eisenhower includes this description of African Americans is B: "to point out that African Americans have greatly suffered for far too long."

Explanation:

I chose this option because I think that what Jackie Robinson wanted to achieve by giving this description to the President was to show that African American had already waited patiently for a long time, as he suggested, and that they are still waiting patiently, but that, also as he asked, they believe they have to have some self-respect for their culture and that is the reason why they can't continue waiting without seeing any change. The message of the President has a double meaning since, if African Americans had some self-respect as he suggests, they would have to finally act and stop being patient, since they have already waited and suffered for far too long without any answers. That is why I chose the second option: Jackie wanted to point out how they have waited patiently all this time.