WARM-UP WHAT TYPE OF FUNCTIONS ARE EACH OF THESE? 1).75 X 2) 3X 2 – 2 3) 3X -.75 Homework out.

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Presentation transcript:

WARM-UP WHAT TYPE OF FUNCTIONS ARE EACH OF THESE? 1).75 X 2) 3X 2 – 2 3) 3X -.75 Homework out

Mean, median, mode, range Mean: the average of a set of data.  Add all numbers in the data set & divide by the total # Median: The middle # of the data set.  Order all the numbers from least to greatest. Find the middle #.  If there are two middle numbers, find the average of the two middle numbers. Mode: The # that occurs the most often in a data set. Range: the difference between the smallest & largest # in the data set.

find the mean, median, mode, & range 9, 5, 8, 5, 9, 8, 4, 8, 7 Mean = 7 Median = 8 Mode = 8 Range = 5

Box & whisker plots A graph that displays the highest & lowest quarters of data as whiskers, the middle two quarters of the data as a box, & the median. Quartiles: Each quarter of the graph which represents ¼ or 25% of the data.

To draw a box & whisker plot 1. Order numbers in the data set from least to greatest 2. Find the median of the entire data set  The median of the entire data set is called the 2 nd quartile in a box & whisker plot 3. Find the median of the lower half of the data set  The median of the lower half of the data set is called the 1 st quartile 4. Find the median of the upper half of the data set  The median of the upper half of the data set is called the 3 rd quartile 5. Draw a box connecting the 1 st, 2 nd, & 3 rd quartiles 6. Draw whiskers from the box to the lowest & highest numbers in the data set.

Draw a box & whisker plot See pg. 32 in pre-alg workbook

Chp 6 tests

mid-term coming up sooner than you think! 10 class days left to the mid-term + 2 days for tests Mid-term is 20% of your grade this quarter Covers the entire semester Will review everything after Thanksgiving May want to start going back & looking at anything that has given you any problems throughout the semester

Hand back tests Test corrections due FRIDAY If you have any questions on problems, be prepared to ask tomorrow in class