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A dentist kept a record of the number of new cavities his patients had per year for the last 10 years. The scatterplot below shows the average number of new cavities per year for patients in the 4-to 32-year age range. Which of the following best describes the trend line of the data shown in the scatterplot? O a horizontal line a line with a negative slope, a line with a positive slope,no trend line

A dentist kept a record of the number of new cavities his patients had per year for the last 10 years The scatterplot below shows the average number of new cavi class=

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[tex]\begin{gathered} \text{when the age increases we see that the average number of new cavities per year tend to decrease, thats why} \\ \text{the trend line of the data is a line with a negative slope; because from the plot, we see that the correlation is } \\ \text{negative, and the slope of the trend line has the same sign as the correlation} \end{gathered}[/tex]