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AP Statistics

5A–5B Day 1 Basics

Shared by Ashton · Oct 20, 2026 · 3 plays

Scatterplots, describing association, correlation r and its limits, then regression lines, prediction, extrapolation, residuals, slope and intercept. Everything on the 5A–5B Day 1 Quiz.

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33 questions across 4 sections. After every answer you’ll see why each choice is right or wrong, not just the one you picked.

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Sections (none selected means all)

Sample questions

Open a question to see the answer choices and the correct answer.

On a scatterplot, which variable usually goes on the horizontal (x) axis?
  1. A. The response variable
  2. B. The variable with more spread
  3. C. The variable with larger values
  4. D. The explanatory variable ✓

Correct answer: D. The explanatory variable (x) goes on the horizontal axis because we use it to predict or explain the response.

What does each point on a scatterplot represent?
  1. A. The average of both variables for the whole data set
  2. B. The difference between the actual and predicted y
  3. C. One observational unit's values for both variables ✓
  4. D. The number of units that share the same x-value

Correct answer: C. Each dot is one individual (a student, a truck, a state), placed at its x-value and its y-value.

What kind of variables does a scatterplot display?
  1. A. Two quantitative variables ✓
  2. B. Two categorical variables
  3. C. One categorical, one quantitative
  4. D. One quantitative variable only

Correct answer: A. A scatterplot shows the relationship between two quantitative variables measured on the same units.

Two variables have a positive association when…
  1. A. y tends to decrease as x increases
  2. B. y tends to increase as x increases ✓
  3. C. y always increases as x increases
  4. D. both variables have positive values

Correct answer: B. Positive association means larger x-values tend to go with larger y-values. It's an overall trend.

What four features should you address when describing a scatterplot?
  1. A. Direction, form, strength, unusual features ✓
  2. B. Shape, outliers, center, and spread
  3. C. Slope, intercept, r, and residuals
  4. D. Mean, median, range, and the IQR

Correct answer: A. DFSU: direction, form, strength, and unusual features, all in context.