Astudent found the slope of a line that passes through the points (3, 15) and (5, 9) to be -1/3. what mistake did he make? a. he used the negative reciprocal of the slope. b. he added a negative sign. c. he used the reciprocal of the slope. d. he did not make a mistake. that is the correct slope.

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average