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MA.912.DP.2.6 · Linear Relationships

Strength and Direction of a Correlation: Sample Algebra 1 EOC Questions

A scatter plot with a line of fit tells students two things: which way the relationship runs and how tightly the points cluster around the line. This benchmark also carries the reminder that a strong correlation does not prove one variable causes the other.

How the Algebra 1 EOC tests this benchmark

The EOC never uses the correlation coefficient and never asks students to compute a line of fit, a slope, or a residual. Residuals are shown graphically instead, and the strength has to be recognizable by eye. Direction is tied to the sign of the slope in context, and causation questions stay at the level of naming another factor that could explain the pattern.

Skills students need

  • Describe the direction of a correlation from a scatter plot
  • Judge strength from how tightly points cluster
  • Read a residual plot
  • Explain why correlation does not prove causation

Try 6 real MA.912.DP.2.6 questions

These come straight from Algebro's Algebra 1 question bank, easiest first. Answer one, check it, then move to the next.

Question 1 of 6

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Question 1EasyMultiple Choice
Figure: a scatter plot of Resale value (thousands of dollars) versus Car age (years) with 8 plotted points, x from 0 to 9 and y from 8 to 24. A trend line is drawn through the data.
The scatter plot shows the age and the resale value for 88 used sedans, along with a line of fit. The dashed segments show the residuals. What is the direction of the correlation between car age and resale value?

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MA.912.DP.2.6: Correlation Practice | Algebro