Bivariate Data

Using the points (6,70) & (9,95), what is the line of best fit equation?

• y = 8.3 x + 20
• y = -8.3 x + 20
• y = 8.3 x + 60
• y = -8.3 x + 60

• A
• B
• C
• D

What relationship is shown in the scatter plot?

• As the cost goes down, the number sold goes down.
• As the cost goes up, the number sold goes down.
• As the cost goes down, the number sold remains the same.
• There is not relationship between cost and the number sold.

A keyboarding instructor at a community college collected data comparing a student's age and their typing speed. The equation for the line of best fit is given as:
y = -1.4x + 117.8
If you are 25 years of age (x), what is your typing speed (y)?

• 153 words per minute
• 83 words per minute
• 63 words per minute
• 102 words per minute

Which is NOT an example of categorical data?

• gender
• hair color
• academic level
• amount of money one makes

The number of times a value occurs

• Two-way table
• Scatter Plot
• Frequency
• Line of Best Fit

Data points that are far away from most other points

• Cluster
• Outlier
• Correlation
• Scatter Plot

• A) y = 1.4x + 55
• B) y = 1.4x - 84
• C) y = 0.72x + 60
• D) y = 0.72x + 56

A baseball coach graphs some data and finds the line of best fit. The equation for the line of best fit is
y = 0.32x - 20.51, where x is the number of times at bat and y is the number of hits.
How many hits should be expected from a player who is at bat 175 times?

• 35 hits
• 49 hits
• 609 hits
• 62 hits

Joe tracked the height of his Dalmatian puppy from age 13 weeks to 25 weeks. He graphed the data and determined the line of best fit is y = 1.12x + 28.78. What does the slope represent in this situation?

• The puppy weighed 28.78 pounds at age 13.
• For every week that goes by, the puppy gains 1.12 pounds.
• The puppy gains a pound every 1.12 weeks.
• The puppy weighs 1.12 pounds when it was born.