Question

A psychologist collects data on the time, w, in minutes, people walk each day and their scores, t ,on a stress test. The scores are from 0 to 100, with higher scores meaning more stress. She finds that there is a negative linear association between w and t that is best modeled by the equation t=−2.5w+48.1 .
What is the meaning of 48.1 in this equation?

A: The people in the study walked an average of 48.1 minutes each day.

B: For each additional minute spent walking, the model predicts that a person's score on the stress test will go down by about 48.1 points.

C: The people who walked each day had an average score of 48.1 on the stress test.

D: The model predicts that a person who does not walk each day will score about 48.1 on the test.

Answer 1

Answer: D: The model predicts that a person who does not walk each day will score about 48.1 on the test.

Step-by-step explanation:

Given: A psychologist collects data on the time, w, in minutes, people walk each day and their scores, t ,on a stress test.

She finds that there is a negative linear association between w and t that is best modeled by the equation $t=-2.5w+48.1$ .

When we put w=0 minutes, t=48.1

It implies that if any patient doesn't walk will score 48.1.

Hence, the model predicts that a person who does not walk each day will score about 48.1 on the test.

Answer 2

The correct answer is D.The model predict that a person who does not walk each day will score about 48.1 on the test. I took the test VuV

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