The scatterplot shows the relationship between $x$ and $y$. A line of best fit is also shown. 

• The scatterplot has 5 data points.
• The data points are in a linear pattern trending up from left to right.
• A line of best fit is shown:
  
  • The line of best fit slants up from left to right.
  • The line of best fit passes through the following approximate coordinates:
    
    • (0 comma 3.20)
    • (1 comma 3.80)
    • (2 comma 4.40)

Which of the following is closest to the slope of this line of best fit?