Answer-
The exponential model best fits the data set.
Solution-
x = input variable = number of practice throws
y = output variable = number of free throws
Using Excel, Linear, Quadratic and Exponential regression model were generated.
The best fit equation and co-efficient of determination R² are as follows,
Linear Regression
Quadratic Regression
Exponential Regression
The value of co-efficient of determination R² ranges from 0 to 1, the more closer its value to 1 the better the regression model is.
Now,
Therefore, the Exponential Regression model must be followed.

Total number of rotten mangoes in the bag = 6
Total number of good mangoes in the bag = 24

Fraction of the rotten mangoes to the total mangoes.



Total number of mangoes in the bag = Total number of rotten mangoes + Total number of good mangoes
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➺
Now,
Fraction = 
➺
➺
Therefore, the fraction of the rotten mangoes to the total mangoes is
.

Total surface area is 152 cm
“C” Os the correct answer