Stats: Review Chapter 6 - Analyze Bivariate Relationships

The scatterplot shows the amount of money earned and the number of hours babysat for a group of friends along with a line of best fit. Use the line and scatterplot to estimate and interpret the residuals for x = 4.

• e = 0; this person earned exactly the expected amount

• e = 5; this person earned $5 more than expected

• e = 3; this person earned $3 more than expected

• e = –3 this person earned $3 less than expected

• e = 3; this person earned $3 less than expected

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write a linear regression equation. Do not use spaces. Round to the thousandth place (3 decimals).

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Which model was best?

• Linear

• Quadratic

• Exponential

• None

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write a quadratic regression equation. Do not use spaces. Round to the thousandth place (3 decimals).

• y = 0.071x² + 2.509x + 12.882

• y = –0.071x² + 2.509x – 12.882

• y = (–0.071x)² + 2.509x – 12.882

• y = –0.071x – 12.882

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write a quadratic regression equation. What is the coefficient of determination? Do not round.

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write an exponential regression equation. Do not use spaces. Round to the thousandth place (3 decimals).

• y = 2.916 + 1.068x

• y = 2.916x + 1.068

• y = 1.068 • 2.916^x

• y = 2.916 • 1.068^x

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write an exponential regression equation. What is the coefficient of determination? Do not round.

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Use Desmos to write an exponential regression equation. What is the coefficient of determination? Do not round.

The scatterplot and table show the ages of 8 track team members and the number of laps that each person ran. Why was the exponential mode the best?

• Its r² was the highest

• Its r² was the closest to 1

• Its |r| was the highest

• Its curve looked the best

The scatterplot shows temperature at the same time but at different elevations on a mountain. Temperatures are measured to the nearest degree Fahrenheit, and elevation is measured to the nearest 10 m. What is the outlier point?

• (31, 70)

• (52, 30.5)

• (70, 31)

• (310, 32)