Answer:
The required equation is 
Step-by-step explanation:
Given : The function for the graph that passes through the points (2.1,2.4), (4.3,6.8), and (6.1,1.9).
To find : Determine the function?
Solution :
First we plot the points with the help of graphing tool.
When we add trend-line in the points it will given you the equation of best fit of the points.
Using Regression calculator,
The equation is given as 
and correlation coefficient is
showing the best fit line.
Refer the attached figure below.
The required equation is 