1. Would you expect a positive correlation,
a negative correlation, or no correlation
between the two data sets?
1. The age of a used car and
the asking price of the car.
2. The length of a baby at birth and
the month in which the baby was born.
3. A person’s height and their shoe size.
Explorations Workbook Pg 340
Susan surveyed 20 people about the price of a cleaning product she developed. She asked each person whether they would buy the cleaner at different prices. A person may answer yes or no to more than one price. Susan’s results are shown in the table.
Make a scatter plot of the data. Describe the type(s) of association you see between the price and number of people who would buy at that price. Explain.

2. #23 PreAlg8 Sem2 Practice Exam Version B
Which pair of variables may
show a positive association?
A. x = the age of your computer
y = the value of your computer
B. x = the number of pets you own y = your shoe size
C. x = average speed you drove on
a road trip y = number of hours it took to
reach your destination
D. x = number of text messages
you send per month y = cost of your monthly cell
phone bill
#36 PreAlg8 Sem2 Practice Exam Version B
Which statement supports
a scatterplot that shows a
negative association?
A. A perfect straight
line of points
B. A line that slopes
down to the right
C. A random pattern
of points
D. The points form a
horizontal pattern
#40 PreAlg8 Sem2 Practice Exam Version B
Which could be an example
of no association?
A. A person's shoe size compared to their weight.
B. Your arm span
compared to your height.
C. The amount of calories
you consume compared
to your weight.
D. A person's salary compared
to the number of years they
went to school.