Question

Which quadratic regression equation best fits the data set?

Answer 1

It's a quadratic function put in calculator

Answer 2

A.
`y = 10.89x^2-27.97x+55.87`

Explanation:

We are given the table,

x y

1 20.4

2 60.5

3 86.8

4 122.4

5 180.4

6 241.2

7 420.8

Using the regression calculator, we get that,

The quadratic equation representing the data is
`y = 10.89x^2-27.97x+55.87`

So, option A is correct.