Scatter Plot Characteristics

The equation of the line of best fit of a scatter plot is
y = –7x – 2. What is the the y-intercept?

• -9

• -2

• 2

• -7x

What is the correlation coefficient of the data characteristics shown?

• -.928

• .928

• .861

• -.861

What COULD be the approximate value of the correlation coefficient for the scatter plot?

• -.851

• -.162

• 0.211

• 0.905

The points in the scatter plot show the ages of cars (x) and their price in dollars (y). What could you conclude about the relationship of the data?

• Age and price have no correlation.

• Age and price have a weak positive relationship.

• Age and price have a weak negative relationship.

Using the graphing calculator to determine the correlation coefficient for each data set. Which one has a bigger correlation coefficient?

• Set A

• Set B

• They are equal.

The relationship ship between a woman's show size and length of her foot, in inches, is given in the table.

Calculate the line of best fit using the graphing calculator.

• a = .25 and b = 7.75

• y = .25x + 7.75

• r = 1

• y = ax + b

Which scatter plot diagram shows the strongest positive correlation?

• 
• 
• 
• 

Select all the characteristics that are true about the scatter plot.

• The scatter plot is nonlinear

• The scatter plot is linear.

• The scatter plot has a positive association.

• The scatter plot has a negative association.

• The scatter plot does not have an outlier.

The scatter plot shows the number of hours traveled and the distance traveled in meters. Determine which answer choice describes what the line of best fit shows:

• the overall relationship between the number of hours traveled and the distance traveled.

• that there is no association between the number of hours traveled and the distance traveled.

• a closer analysis from each point to the other point in the dataset.

• the number of hours plus the umber

Select all the characteristics that describe the graph.

• Positive

• Negative

• Linear

• Nonlinear

• There is an outlier.