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Chapter 3: Q. 35 (page 191)

You use the same bar of soap to shower each morning. The bar weighs 80grams when it is new. Its weight goes down by 6 grams per day on average. What is the equation of the regression line for predicting weight from days of use?

Short Answer

Expert verified

The equation isy^=80-6x.

Step by step solution

01

Given Information

The bar weighs 80grams when it is new. Its weight goes down by 6 grams per day on average.

02

Explanation

Consider that,

y=weight of the bar

x=day

X starts with 80 grams of weight y, then decreases by 6 grains a day:

y^=80-6x

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