Given table 
______
x         y
______
2.4     9
7.2     28
7         24
8.3      35
3.1      9
7.2     30
9        32
_________
So, the coordinates on the graph (2.4, 9), (7.2, 28), (7, 24), (8.3, 35),  (3.1 , 9), ( 7.2, 30), (9, 32).
The first graph represents the line of best fit.
The definition of line of best fit " A line of best fit is a straight line that best represents the data on a scatter plot. This line may pass through some of the points, none of the points, or all of the points.".
Note: Most of the points should be as closer as possible to the drawn line.