SAT Two-variable data: models and scatterplots Practice Question 13 (Easy)

Question bank / Two-variable data: models and scatterplots

Math · Problem-Solving and Data AnalysisEasy

The line of best fit for a scatterplot passes through the points $(0, 12)$ and $(6, 0)$ . Which of the following is an equation of this line?

$y = 2x + 12$

$y = -0.5x + 12$

$y = -2x + 12$

$y = 12x - 2$

Show answer and explanation

Answer: C

The slope is $\frac{0 - 12}{6 - 0} = -2$ . The line passes through $(0, 12)$ , so the $y$ -intercept is $12$ . The equation is $y = -2x + 12$ .

Choice B uses the reciprocal of the slope, dividing the change in $x$ by the change in $y$ .

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