Which option below best describes the difference between an experiment and an observational study? a. the values in an experiment are chosen at random, but not in an observational study. b. the values in an observational study are chosen at random, but not in an experiment. c. the groups in an experiment are chosen at random, but not in an observational study. d. the groups in an observational are chosen at random, but not in an experiment.

Create a graph for the demand for starfish using the following data table: quantity/price of starfish quantity (x axis) of starfish in dozens price (y axis) of starfish per dozen 0 8 2 6 3 5 5 2 7 1 9 0 is the relationship between the price of starfish and the quantity demanded inverse or direct? why? how many dozens of starfish are demanded at a price of five? calculate the slope of the line between the prices of 6 (quantity of 2) and 1 (quantity of 7) per dozen. describe the line when there is a direct relationship between price and quantity.