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Two-Variable Data: Models and Scatterplots

SAT Math· difficulty 4/5

A line of best fit relating temperature xx (°F) to ice cream sales yy (dollars) is y=25x−500y = 25x - 500. The slope means:

  • A

    Sales decrease by 25 dollars per degree.

  • B

    Sales reach 500 dollars at zero degrees.

  • C

    Each 1° increase in temperature predicts 25 more dollars in sales.

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  • D

    Each 1° increase predicts 500 more dollars.

Explanation

Slope = predicted change in yy per unit change in xx: 25 dollars per degree.

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