The association is best described as:

Answer: Strong, negative, linear As price increases, demand decreases in a tight straight pattern.

Which placement is correct?

Answer: Height is the explanatory variable on the x-axis; weight is the response on the y-axis Explanatory (predictor) goes on x; response (predicted) goes on y.

A scatterplot displays

Answer: Two quantitative variables Scatterplots show the relationship between two quantitative variables.

AP Statistics · Topic 2.4

Representing the Relationship Between Two Quantitative Variables Practice

Part of Exploring Two-Variable Data.(DAT-1.A)

Practice questions

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Sample questions

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Sample 1difficulty 1/5
$The scatterplot shows demand vs price.$
$The association is best described as:$
- A
  $Weak and curved$
- B
  $Strong, negative, linear$
  check_circle
- C
  $No association$
- D
  $Strong, positive, linear$
Why
$As price increases, demand decreases in a tight straight pattern.$
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Sample 2difficulty 1/5
$A researcher uses height to predict weight.$
$Which placement is correct?$
- A
  $Height is the explanatory variable on the x-axis; weight is the response on the y-axis$
  check_circle
- B
  $Weight on x; height on y$
- C
  $Both on the y-axis$
- D
  $Both on the x-axis$
Why
$Explanatory (predictor) goes on x; response (predicted) goes on y.$
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Sample 3difficulty 1/5
$A scatterplot displays$
- A
  $Two categorical variables$
- B
  $Two quantitative variables$
  check_circle
- C
  $One quantitative variable$
- D
  $A time series only$
Why
$Scatterplots show the relationship between two quantitative variables.$
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Sample 4difficulty 2/5
$The scatterplot shows distance vs time for a runner.$
$Approximately how many miles correspond to 6 hours?$
- A
  $30$
  check_circle
- B
  $20$
- C
  $40$
- D
  $10$
Why
$At x = 6 hours the y-value is 30 miles per the gridlines.$
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Sample 5difficulty 2/5
$A teacher records hours studied and test scores for nine students.$
$Which best describes the association shown?$
- A
  $No association$
- B
  $Weak, positive, nonlinear$
- C
  $Strong, negative, linear$
- D
  $Strong, positive, linear$
  check_circle
Why
$Points rise from lower-left to upper-right in a tight straight band, indicating a strong positive linear association.$
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