Linear Models Make Predictions

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

• 65

• 92

• 70

• 76

__________ allow us to describe data to others, compare data more easily to other data, and allow us to make predictions. For example, mathematical _________ of weather patterns allow us to predict the weather.

• Solution

• Let statement

• Mathematical Sentence

• Models

Which of the following could be a possible line of best fit for the data?

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15 

Mrs. Collins made a scatterplot to show the relationship between the number of absences and a student’s final exam score. Based on this scatterplot, a student with 6 absences should get approximately what score on the final exam?

• 85

• 92

• 70

• 76

Which of the following best models a linear function fitted to the data in the scatter plot?

• 
• 
• 
• 

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

The equation of the trend line is y= 1/2x +1
How many laps can a bicycle make around the park in 23 minutes?

• 44 laps

• 12 1/2 laps

• 23 laps

What is the equation of the line of best fit?

• y = -25x + 170

• y = -5/8x + 170

• y = 25x + 170

• y = 5/8x + 170

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above