Linear and Quadratic Regression

The table shows the relation between the number of hours worked babysitting and the total price for the services. Using the data shown above, which equation could be used to predict the total price for babysitting services?

• c = h +39

• c = 11h - 1

• c = 8h + 11

• c = 10h + 3

Tags

CCSS.8.EE.B.5

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

Given the set of data, estimate what the value of y will be when x = 14. Round your answer to the nearest tenth.

• 340

• 200.5

• 343.4

• 433.2

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CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

Determine the curve of best fit.

• y = -2.7x + 7.4

• y = 0.95x² - 2.08x - 0.75

• y = -.05x - 3.26

• y = 0.95x² + 2.08x + 0.75

Tags

CCSS.8.F.A.2

CCSS.8.SP.A.1

CCSS.8.SP.A.3

The data in the table represents a linear relationship between altitude and temperature.

• y = -0.14x + 74.88

• y = -0.14x - 74.88

• y = 0.14x + 74.88

• y = -2.35x² - 0.09x + 73.79

Tags

CCSS.8.F.A.2

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

Which equation fits the pattern of the following sets of ordered pairs?

• y = -1/2 x + 3

• y = -1/2 x - 3

• y = x + 3

• y = x - 3

Tags

CCSS.8.F.A.2

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

The table below gives the number of hours spent studying for a math exam (x) and the exam grade (y). Using a line of best fit, predict the exam grade of a student who studied 5 hours.

• 100

• 93

• 96

• 87

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

This set of ordered pairs shows a relationship between x and y. Using the line of best fit, which is closest to the output when the input is 3?

• 10.72

• 9.5

• 2.5

• 13

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

The table below shows the 2014 postage rates for mailing first-class envelopes. Using the line of best fit, which value represents the postage rate of a 14 ounce envelope?

• $3.50

• $3.71

• $2.73

• $2.94

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

Using the data plotted on the scatterplot, which equation most closely describes a line of best fit for the data?

• y = 2x - 4

• y = 2x + 5

• y = x + 6

• y + 3x - 4

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3