Homework Help for math

Question

1. The following table shows the weight distribution of people versus their given blood sugar:

Weight: 175 150 185 135 120 135 200

Blood Sugar: 145 130 160 115 100 105 160

a. Find the equation of regression line rounded to whole # (𝑦 = 𝑎 + 𝑏𝑥)

b. Find the linear correlation 𝑟.

c. Is this an insignificant or significant correlation? Why?

d. Find the coefficient of determination 𝑟! in percent form

e. Predict the value of blood sugar for Mr. Scott body weight: 210 lbs

Answer 1

mean of x 157.1428571

mean of y 130.7142857

correlation coefficient r 0.97780922

A 1.617647

B 0.82152406

the equation of the best fit trend line is y = Bx+A = 0.82152406x + 1.617647

This is a strong linear relationship. the closer to 1 or -1, the better

Estimated sugar level for weight x=210 is 0.82152406*210 + 1.617647=174.1376996