Pretest Answers

Which function best models the data?

Which best describes her prediction?

For which temperature will the model most accurately predict the time spent cooling?

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 of x is equal to 33 times 1 point 3 to the x th power where x is the number of days the video has been online. About how many people had viewed the video once it had been online for 20 days?

The end of a hose was resting on the ground, pointing up an angle. Sal measured the path of the water coming out of the hose and found that it could be modeled using the equation f of x is equal to negative 0 point 3 x squared plus 2 x , where f of x is the height of the path of the water above the ground, in feet, and x is the horizontal distance of the path of the water from the end of the hose, in feet. When the water was 4 feet from the end of the hose, what was its height above the ground?

A new interesting facts podcast dropped on March 1 The crew tracked the number of listeners each week for 10 weeks. The function f⁡(x)=3.4⁢(1.21)^x approximates the number of thousands of listeners x weeks after the podcast first aired. About how many listeners were there after 6 weeks? The function models the number of listeners in thousands, so convert your answer to the total number of listeners and round to the nearest whole number. Enter your answer in the box. [Blank 1] listeners

Juan analyzes the amount of radioactive material remaining in a medical waste container over time. He writes the function f of x is equal to 10 times 0 point 9 8 to the x th power 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?

Which type of model best describes the relationship?

Which model best represents the data set?