When using the method of limits to measure a threshold, the crossover point between detecting vs. not-detecting a threshold may be different for ascending and descending trials. (see isle 2.2 to experience method of limits). why do you think this happens? researchers usually average together the results of ascending and descending trials. do you think this is valid? why or why not?

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8