Digital SAT Reading and Writing Practice Question #1172
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
When analyzing a scatter plot, first identify the general direction and strength of the relationship between the variables. Is it positive, negative, or no correlation? Does it appear linear or non-linear?
For statements describing a trend or rate of change, consider calculating the average change over several intervals or estimating the slope of a line of best fit to verify the approximation. Compare this to statements that only describe individual data points; which provides a more comprehensive summary of the data?
⚡ Hack the Test: For questions asking for the 'best supported' statement from a scatter plot, prioritize options that describe the *overall trend* or *approximate rate of change* (like the slope of a line of best fit) over options that merely state a fact about a single data point, unless the question specifically asks for a maximum/minimum value or a specific point's characteristic. To quickly estimate the average rate of change, calculate the slope using the first and last points: (100, 10) and (10, 24). The change in y is 10 - 24 = -14. The change in x is 100 - 10 = 90. The slope is -14/90. Since the x-axis is in thousands, an increase of 10,000 EVs means an increase of 10 units on the x-axis. So, the change in PM2.5 for 10,000 EVs is (-14/90) * 10 = -14/9 ≈ -1.55. This quick calculation immediately points to Option D.
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