San P.

asked • 06/02/21# Question on Math homework Please help!

**Ten circular cardboard disks were weighed and the mass in grams and corresponding radius in centimeters were recorded. The information is shown below:**

**cm: 9.6, 9.0, 7.7, 6.3, 5.3, 4.7, 3.7, 2.4, 1.3, 0**

**gm: 5.4, 4.6, 3.4, 2.3, 1.6, 1.2, 0.8, 0.3, 0.1, 0**

**1.) What is the linear regression equation (round to the nearest hundreth)?**

**2.) What is the value of r^2, the coefficient of deteriation, for the linear equation in the previous question? Does it suggest a linear model is a good fit for the data? Explain your answer (using a text box).**

**r^2 = ___**

## 1 Expert Answer

John M. answered • 06/02/21

Math Teacher/Tutor/Engineer - Your Home, Library, MainStreet or Online

Using the Stat Plot routine on the calculator:

y = ax + b

a = 0.6048

b = -0.9142

Correlation Coefficient (r): 0.95900

Coefficient of Determination (r^{2}):0.91969

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San P.

I'm sorry, I meant to write "determination" not "deterioration". My bad.06/02/21