Which of the following statements are correct? Select three that apply. a The function y = 10x is not linear. b The function y = - 5x - 15 is linear. The function y = 2x2 + 10 is not linear. d The graph of the function y = 12x + 1 is a straight line. e The graph of the function y = – 20x is not a straight line. f The graph of the function y = 7x2 + 10 is a straight line.

Studies show that massage therapy has a variety of health benefits and it is not too expensive. a sample of 12 typical one-hour massage therapy sessions showed an average charge of $58. the population standard deviation for a one-hour session is =$5.55. a. what assumptions about the population should we be willing to make if a margin of error is desired? (select your the population has uniform distribution/ the population is at least approximately normal is required/ the population has no exponential distribution/ no assumptions should be made) b. using 90% confidence, what is the margin of error (to 2 decimals) c. using 99% confidence, what is the margin of error (to 2 decimals)