(a) A scientist studies the impact of a drug on cancer. The variables are the administration of the drug - the dosage and the timing. The variable is the impact the drug has on cancer. (b) A scientist studies the impact of withholding affection on rats. The variable is the amount of affection. The variable is the reaction of the rats. (c) A scientist studies how many days people can eat soup until they get sick. The variable is the number of days of consuming soup. The variable is the onset of illness. (d) In a study to determine whether how long a student sleeps affects test scores, the variable is length of time spent sleeping while the variable is the test score. (e) You want to compare brands of paper towels, to see which holds the most liquid. The variable in your experiment would be the brand of paper towel. The variable would be the amount of liquid absorbed by a paper towel. Question 2 (5 marks) Answer the following questions regarding the least squares rec