What is the quadratic regression equation for the data set?
a. yˆ=0.056x2+1.278x−0.886 b. yˆ=0.056x2+1.278
c. yˆ=0.056x2+1.278x
d. yˆ=0.056x2−1.278x−0.886

Option:A is the correct answer.

The quadratic regression equation for the data set is:

    A.  

We are given a set of data value as:

         x                y

         3             3.45

         5              6.9

         6             8.79  

         8             12.91

         10            17.48

         12            22.49

         15            30.85

On plotting these points on a scatter plot we see that the line that best fits these data points is a parabola i.e. the equation is a equation of a quadratic function.

The equation of the line of best fit is:

64

Step-by-step explanation:

hope this helps