Scatterplot Correlation Coefficients and Line of Best Fit

Find the line of best fit. Then use it to predict attendance for game 9.

• 5,000

• 2,620

• 17,000

• 20,200

The name for a graph of plotted points that shows a relationship between two sets of data

• Coordinate plane

• Scatter plot

• Function graph

• Correlation

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

The regression line equation for this date is y = 1.4x + 47. What does the y-intercept represent in this scenario?

• Students studied an average of 47 minutes

• Students scored an average of 47 points when they studied

• Students earned 1.4 more points when studying

• Students who studied 0 minutes, earned an average of 47 points.

Which of the following correlation coefficients indicate a strong linear correlation?

• −0.872691

• −0.658799

• −0.125866

• 0.989862

• 0.798264

Given this regression line information in Desmos, what is the equation of the regression line?

• y = 0.9499x

• y = 3.2x + 28

• y = 0.95x + 0.90

• y = 28x + 3.2

A person travels by car.  They record their miles driven in a data table.  Calculate the linear regression equation of this data.

• y = 61.93x - 1.79

• y = -1.79x + 61.93

• y = 0.016x + 0.03

• y = 0.03x + 0.016

What could be the relationship statement for this scatter plot?

• Ice cream sales depend on temperature.

• As the outside temperature increases, the ice cream sales increase.

• As the outside temperature decreases, the ice cream sales increase.

• There is no relationship between sales and temperature.

What type of association does this scatter plot represent?

• positive linear association

• negative association

• no association

• nonlinear association