Question: Plot a regression line of the previous plot with a dashed line with width 2 and color cadetblue. The x-axis is age, and the y-axis
Plot a regression line of the previous plot with a dashed line with width 2 and color
"cadetblue".
The x-axis is age, and the y-axis is fl. the data is shown in the figure.
Please show the code of the project and solve it in R language?

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