Which quadratic regression equation best fits the data set?

Step-by-step explanation:

Since the general quadratic equation is,

Here the given table is,

x           1             2              3            4               5              6             7

y          5.9        8.9          13.4         20.1          30.1         45.1        67.7

By the graphing calculator,

a = 1.87024 ≈ 1.87

b= -5.15833 ≈ -5.15

c = 10.5429 ≈ 10.54

By putting the values of a, b and c,

The required quadratic equation is,

⇒ First Option is correct.

hiking down a winding trail.

step-by-step explanation:

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