Regression Models Answers

Juan analyzes the amount of radioactive material remaining in a medical waste container over time. He writes the function f(x)=10(0.98)x to represent the amount of radioactive material that will remain after x hours in the container.Rounded to the nearest tenth, how much radioactive material will remain after 10 hours?

Jessica plots the data points relating the amount of money she needs to repay a loan and the number of months she has been making payments. She calculates two regression models. Which is true?

The table shows the estimated number of bees, y, in a hive x days after a pesticide is released near the hive.

The table compares x, the number of minutes of television Sam watched each day, to y, the number of minutes she spent exercising. The function y = –0.78x + 95 models the data in the table.

The data in the table represents a company’s profit based on the number of items produced.

Janna is making a prediction of the frequency of a key that is 12 keys from middle C.

The quadratic regression graphed on the coordinate grid represents the height of a road surface x meters from the center of the road.

The table shows the wavelength of the sound produced by keys on a piano x keys away from the A above middle C.

The data in the table compares x, the number of pages in a chapter, to y, the amount of time, in minutes, spent reading. The function y = 0.86x – 0.09 models the data in the table.

Marta’s mother shared a funny video of their cat on the Internet. The total number of people who had viewed the video over the first 30 days could be modeled using the function f(x) = 33(1.3)x where x is the number of days the video has been online.