1) When studying a cause and effect relationships, usually, is the cause the dependent or the independent variable? Is the effect the dependent or the independent variable?
2) When studying a cause and effect relationships, why is it important to change, when possible, only ONE independent variable at a time?
3) If A is 10 and B is 15, what is the ratio of A to B? Express your answer as a decimal number, rounded to keep 3 digits, starting from the first non-zero digit.
4) If we say that a variable x is proportional to another variable y, what does that mean?