Correlation and Regression Quiz – Algebra 1 (10 Questions)

Last updated: October 22, 2026 · Written by the Math Made Easy math teachers

Standards: S-ID.B.5, S-ID.B.6, S-ID.C.7, S-ID.C.8, S-ID.C.9 · Level: Grade 9 Algebra 1

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What this Reading Two-Way Tables and Scatter Plots quiz checks

• Joint, marginal and conditional relative frequencies come from a two-way table.
• The line of best fit has the form ŷ = mx + b; the slope is the predicted change in y per 1 unit of x.
• Residual = observed value − predicted value.
• The correlation r lies between −1 and 1; values near ±1 show a strong linear relationship.
• Correlation does not prove causation, and extrapolating is risky.

The 10 questions of the quiz

1. In a two-way table, what is a marginal relative frequency?
2. In a survey of 60 students, 12 are in 9th grade and play soccer. What is the joint relative frequency of 9th graders who play soccer?
3. Of 40 seniors, 28 drive to school. What is the relative frequency of driving among seniors?
4. The line ŷ = 3.2x + 15 predicts free throws made after x hours of drills. What does the slope mean?
5. A point has observed value 42 and predicted value 38.5. What is its residual?
6. The scatter plot shows points close to a rising line.Which value of r fits best?
7. The scatter plot shows a falling trend with noticeable scatter.Which value of r fits best?
8. Cities with more ice cream sales also have more drownings. What is the best explanation?
9. Which number cannot be a correlation coefficient?
10. A line was fitted to data for ages 10 to 16. Why is it risky to use it to predict at age 40?

After the quiz

Missed a question? Reread the Reading Two-Way Tables and Scatter Plots lesson, then take the quiz again. Next, solve the Algebra 1 worksheet on Reading Two-Way Tables and Scatter Plots, one star first, then two and three stars. Finally, take the chapter test under real conditions, without notes and with a timer.