Solve.
5 plot a point for some of the ordered pairs from the example
problem shown at the right. model the relationships by
drawing a line from the y-axis through each point. explain
how the graphs show which relationship is proportional
and which is not proportional.
company a: (5, 15), (10,,75)
company b: (5,20), (10,,80)
cost ($)
x
10 20 30
number of mugs

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed