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A student believes there is a correlation between the number of texts sent during class and GPA. The student collected data and found that the line of fit can be modeled by the equation ŷ = 3.9 − 0.1x.

Identify and interpret the slope in this scenario.

The slope is 3.9. Starting at 0.1, the GPA will increase by 3.9 for every text sent in class.
The slope is 3.9. Starting at 0.1, the GP will decrease by 3.9 for every text sent in class.
The slope is −0.1. Starting at 3.9, the GPA will increase by 0.1 for every text sent in class.
The slope is −0.1. Starting at 3.9, the GPA will decrease by 0.1 for every text sent in class.