Lines of Best Fit Quiz

The table shown is comparing a person's foot length to their height in cm. Calculate a line of best fit.

• f(x) = 25.05x + 5.57
• f(x) = 5.57x + 25.05
• f(x) = -5.57x + 25.05
• f(x) = 5.57x - 25.05

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What is the line of best fit?

• f(x)= 5x+1.82
• cannot be determined
• f(x)= 1.82x + 5.02
• f(x)= 1.1x + 4.2

Tags

CCSS.8.EE.B.5

Students in a group of chess teams submitted data about hours of team practice and the number of matches the team won. The graph shows the results of the data. Based on the linear regressions equation y = 3.14x + 3.52, if a team practices 4.5 hours per week next year, which is the best prediction of the number of chess matches a team could expect to win?

• about 24

• about 12

• about 8

• about 18

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSA.REI.D.10

Using your linear regression, what is y when x is 30?

• 61.59
• 52.46
• 57.94
• 59.76

Tags

CCSS.8.EE.C.8C

What is the equation for this table?

• y = 2x + 2
• y = x + 6
• y = 3x
• y = x - 8

Tags

CCSS.5.G.A.2

Which equation matches the table?

• y = ¼x + ¼
• y = ¼x
• y = x + ¼
• y = ½x

Tags

CCSS.6.EE.C.9

Find the line of best fit.

• y = -0.96x + 0.78

• y = 0.66x - 0.89

• y = -2x + 2

• y = 2x - 2

Find the line of best fit

• y = 1.2x + 22

• y = 22x + 1.2

• y = 12x + 47

• y = 47x + 12

Find the best fitting quadratic model for the data given.

• y = 1.2x² + 13x + 504.3

• y = 12x² + 13x + 504.3

• y = .12x² + 1.3x + 504.3

Calculate the Curve of Best Fit for this table of values:

• y = 2x² - 9x + 10

• y = 3x² + 9x - 10

• y = 3.1x² - 9.2x - 10.3

• y = 2.1x² - 8.6x + 10.1