Bivariate

About what should the number of manatees be by the year 2015?

• 3000

• 2500

• 5000

• 6000

What would be the correlation be between study time and test grades?

• positive correlation

• negative correlation

• no correlation

• cannot be determined

What is a line of best fit used for?

• To predict things

• To have a better understanding of the graph

• To connect the points

• To make you look smart

• A
• B
• C
• D

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

• y = 1.45x + 22
• y = -2x + 15
• y = 1.33x + 30
• y = -1.5x + 24

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

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

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