Apsychologist 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?

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.

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

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

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

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )