Lesson 05: Describing Trends in Scatter Plots | Unit 6: Associations in Data

Draw

Draw a line that you think is a good fit for this data. For this data, the inputs are the horizontal values, and the outputs are the vertical values.

Multiple Choice

What would you expect the output value to be when the input is 10 based on your line of fit?

• 15
• 5
• 20
• 30

Multiple Choice

For the same data, two different models are graphed. Which model more closely matches the data?

• Model A

• Model B

Open Ended

Explain your reasoning for choosing the model that more closely matches the data.

Draw

Ecologists measure the body length and wingspan of 127 butterfly specimens caught in a single field. Draw a line that you think is a good fit for the data.

Multiple Choice

What is the equation for the line of best fit for the body length and wingspan of 127 butterfly specimens?

• y = 0.4x + 3
• y = 0.3x + 5
• y = 0.2x + 15
• y = 0.5x + 10

Multiple Choice

What does the slope of the line tell you about the relationship between the wingspans and body lengths of the butterflies?

• The slope indicates no relationship between wingspan and body length.
• The slope indicates a positive correlation between wingspan and body length.
• The slope shows a negative correlation between wingspan and body length.
• The slope represents a constant body length regardless of wingspan.