Bivariate Data Stuff

Several schools reported the number of students who received a flu vaccine in a year and the number of cases of the flu amongst their students that year. A scatter plot was made with a trend line that had an equation of y=-\frac{1}{4}x+85. Use the equation to predict the number of cases of the flu that would occur if 300 students received he flu vaccine.

• 75

• 160

• 300

• 10

A scatter plot was created to show the length of a person's vacation and the weight of the suitcase they packed. The equation of the trend line is y=5x+15, where x represents the length of the trip.

Use the equation to predict the weight of a suitcase for someone taking a 9-day trip.

• 45

• 60

• 15

• 55

What is the trend for this scatter plot

• Negative

• Positive

• None

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

If a line of best fit models the data very well, what would you expect to see in a graph of the data and the line?

• The line connects a lot of the points.

• The line is underneath all the points.

• The line is non-linear.

• The line is close to all the points.

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

• 3000

• 2500

• 5000

• 6000

• 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