Scatter Plots, Trend Lines, Two-Way Tables, Correlation

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

• y = -25x + 170

• y = 25x + 170

• y = -(5/8) x + 170

• y = (5/8) x + 170

The graph above shows a line of best fit for data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served.  What is the equation of the line of best fit?

• y = (5/3) x + 375

• y = (1/3) x + 475

• y = (5/3) x + 475

• y = (1/3) x + 375

• Positive

• Negative

• None

• There are 40 total paintballs

• There are 40 blue paintballs

• Blue paintballs were thrown 40 times

• The blue paintball hit the target 40 times.

What is a reasonable slope for this graph?

• -5

• -2

• 10

• 5

What type of correlation is seen

• positive

• negative

• none

What is a reasonable slope for the graph

• 1/10

• -1/2

• 10

• no line of best fit

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

• All of the above

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D