Regression Models — Cumulative exam Answers

Mario invested $6,000 in an account that pays 5% annual interest compounded annually. Using the formula A = P(1 + r)t, what is the approximate value of the account after 2.5 years?

Which expression is equivalent to ?

The table shows the estimated number of lines of code written by computer programmers per hour when x people are working.

Georgianna wants to use the linear model associated with the data in the table to make a prediction.

Simplify .

A research study was conducted to measure the time students focused on a task before being distracted. The box plots show the distributions of attention spans of high school and college students.

Ms. Sutton recorded the word counts and scores of the top ten essays in a timed writing contest. The table shows her data.How does the word count of an essay relate to its score in the contest?

Which graph shows a negative correlation?

The table shows the number of calories in four meals and the cost of each meal.

Combine and simplify these radicals.

The box plots show the data distributions for the number of text messages Will and Jaime sent each day.

The table shows the number of flowers in four bouquets and the total cost of each bouquet.

Which phrases describe the relationship between heart rate and daily intake of caffeine? Select two options.

Scientists studied a deer population for 10 years. They generated the function f(x) = 248(1.15)x to approximate the number of deer in the population x years after beginning the study. About how many deer are in the population 3 years after beginning the study?

Simplify .

Which expression is equivalent to ?

The graph shows the best-fit regression model for a set of data comparing the number of hours spent hiking and the number of miles traveled in one day.

A 2-column table with 4 rows. The first column is labeled x with entries 0, 1, 4, 5. The second column is labeled y with entries 0, 1, 4, 5.

A builder needs three pipes of different lengths. The pipes are feet long, feet long, and feet long.How many feet of piping is required in all? (Hint: Try dividing each radicand by 6.)

The equation shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A, in astronomical units, AU. If the orbital period of planet Y is twice the orbital period of planet X, by what factor is the mean distance increased?