Bivariate Statistics

A city manager made a scatter plot of the number of retail stores in the city over the years. A scatter plot had a trend line with an equation of y=11x+12, where y is the total number of retail stores and x is the number of years since 1990.

Use the equation to predict the number of retail stores in the city in 1997. (7 years later).

• 89

• 77

• 7

• 98

Tags

CCSS.HSF.BF.A.2

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

Choose the best estimate for the correlation coefficient.

• .99

• .79

• .78

• -1.00

Which is the term that means a graph with points plotted to show a possible relationship between sets of data?

• Line of best fit

• Two Way Table

• Scatter Plot

• Correlation Coefficient

Which is the term that means a line that comes closest to all of the points in a scatter plot?

• Positive Correlation

• Negative Correlation

• No Correlation

• Line of best fit

Which is the term that describes how closely points in a scatter plot are related?

• Correlation Coefficient

• Scatter Plot

• Line of Best Fit

• Negative Correlation

What kind of correlation is shown in the graph?

• Positive correlation

• Negative correlation

• No correlation

What would be the first step in finding the line of best fit?

• Pressing the "data" button

• Finding the ordered pairs

• Pressing "2nd data"

• Graphing the points

If the line of best fit is y = -x + 8, what is the predicted y if x = 12?

• -4

• 4

• 12

• 20

To predict a future score, what do you need to do with the table?

• Find the line of best fit

• Put it in the calculator

• Make your best guess

• Find the answer