Line of Best Fit Linear

What is the equation formula for linear regression (line of best fit)?

• y₁ ~ bx₁ + m

• x_{1 ~} my₁ + b

• x₁ + b ~ my₁

• y₁ ~ mx₁ + b

What is a "line of best fit" used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

Tags

CCSS.8.EE.B.5

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

• y = 1.5x + 12

• y = 12x + 1.5

• y = 0.67x - 8

• y = -8x + 0.67

Tags

CCSS.8.EE.C.8C

Write the linear regression equation for the following data points. Round to the nearest tenth.

Tags

CCSS.8.EE.C.8C

Write the linear regression equation for the following data points. Round to the nearest tenth.

• $$y=-0.27x+3.93

Tags

CCSS.8.EE.C.8C

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.EE.B.5

A restaurant sells pizza for the prices in the data table. If a pizza has 10 toppings, what would be the price of the pizza?

• $72

• $20

• $27

• $30

Tags

CCSS.HSF.IF.A.2

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

• y = 0.016x + 0.03

• y = -1.79x + 61.93

• y = 61.93x - 1.79

• y = 0.03x + 0.016

Using the linear regression equation you found in the previous question, what is the y value, if the x value is 7.5? (Round to nearest tenth).

• y = 5.6

• y = 7.5

• y = -7.6

• y = -5.6
  

Tags

CCSS.8.EE.B.5

Using the linear regression equation from the previous problem, if the y value is equal to -1, what is the x value?

• 17

• 17.99

• 18.49

• 19