Question 1 Answer & Explanation - SAT Algebra

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algebra

A scatterplot shows a strong positive linear association between hours studied ( $x$ ) and test score ( $y$ ). The line of best fit is $y = 5x + 40$ . Predict the score for 8 hours of study.

$80$

$85$

$90$

$75$

Correct Answer: A

Choice A is the correct answer. Substitute into the model.

Model: $y = 5x + 40$ .
Substitute: $x = 8$ .
Calculate: $y = 5(8) + 40 = 40 + 40 = 80$ .

💡 Strategic Tip: Models allow us to make predictions for specific input values.

Choice B is incorrect because calculation error. Choice C is incorrect because calculation error. Choice D is incorrect because calculation error.

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Linear Functions Set 97

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