Quiz about Regressions

Question 1

What type of correlation best describes the scatterplot shown.

Accepted Answer

no correlation

Answer

positive, weak

Answer

positive, strong

Answer

negative, weak

Question 2

What type of correlation best describes the scatter plot shown?

Accepted Answer

negative, strong

Answer

positive, weak

Answer

positive, strong

Answer

negative, weak

Question 3

What correlation coefficient would be describe the correlation?

Accepted Answer

0

Answer

-0.999

Answer

0.978

Answer

0.2

Question 4

Which correlation coefficient best describes the correlation shown?

Accepted Answer

-0.75

Answer

0

Answer

-0.3

Answer

0.3

Question 5

Which type of regression model does the scatter plot appear to show?

Accepted Answer

quadratic

Answer

linear

Answer

exponential

Question 6

Which type of regression model does the scatter plot appear to show?

Accepted Answer

exponential

Answer

linear

Answer

quadratic

Question 7

The linear regression equation is y = 61.93x - 1.79.  Use the equation to predict how far this person will travel after 10 hours of driving.

Accepted Answer

617.5 miles

Answer

10 miles

Answer

0.19 miles

Answer

500 miles

Question 8

The linear regression equation is y = 61.93x - 1.79.  According to the model, the slope can be interpreted as:

Accepted Answer

They drove at a speed of 61.93 miles per hour.

Answer

After 0 hours of driving, they went 61.93 miles.

Answer

They drove 61.93 miles total.

Answer

They drove 61.93 hours total.

Question 9

A restaurant sells pizza for the prices in the data table.  Calculate the linear regression equation of the data.

Accepted Answer

y = 1.5x + 12

Answer

y = 12x + 1.5

Answer

y = 0.67x - 8

Answer

y = -8x + 0.67

Question 10

A person travels by car. They record their miles driven in a data table. Calculate the linear regression equation of this data.

Accepted Answer

y = 61.93x - 1.79

Answer

y = -1.79x + 61.93

Answer

y = 0.016x + 0.03

Answer

y = 0.03x + 0.016

Question 11

Determine the curve of best fit. Hint: view the scatter plot and check correlation coefficients to determine which is the best fit.

Accepted Answer

y = 0.95x²- 2.08x - 0.75

Answer

y = -2.7x + 7.4

Answer

y = -.05x - 3.26

Answer

y = 0.95x²+ 2.08x + 0.75

Question 12

Find the quadratic equation for the relationship of the horizontal distance and the height of the ball.

Accepted Answer

y= -.12x² + 2.11x + 4.22

Answer

y= -18x² + 2.11x + 4.21

Answer

y= -.06x²+1.06x + 7.9

Answer

y= -6x²+1.06x + 79

Question 13

A chemist has a 100-gram sample of a radioactive material. He records the amount of radioactive material every week for 6 weeks and obtains the following data. Determine the exponential regression that best models these data.

Accepted Answer

y = 100(.87)^x

Answer

y = 100(8.7)^x

Answer

y = 100(1.87)^x

Answer

y = 100(.13)^x

Question 14

Which of the following is the exponential regression equation for this data?

Accepted Answer

Y = 8.16(2.7)^X

Answer

Y = 81.6(2.7)^X

Answer

Y = 8.16(.27)^X

Answer

Y = 8.16(27)^X

Question 15

Is the pictured graph growth, decay, or linear or none?

Accepted Answer

Exponential Growth

Answer

Exponential Decay

Answer

Linear

Answer

None

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Mathematics