Polynomial Regressions

Hint- turn on STAT plot and compare regressions

• A

• B

• C

• D

• E

• A

• B

• C

• D

• E

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

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

• linear

• exponential

• quadratic

Find the best fitting quadratic model for the data given.

• 2x² + 13x + 504.3

• 12x² + 13x + 504.3

• 0.12x² + 1.3x + 504.3

Find the best fitting quadratic model for the data given.

Which of the following quadratic equations best represents the following data?

• y = 4x² + 1

• y = 3x² + 8x - 3

• y = 4x²

• y = 3x² + 3x - 1

Calculate the quadratic regression function for this table of values to the nearest tenth.

• f(x) =
   2x² - 9x + 10

• f(x)=
   3x² + 9x - 10

• f(x) =
   3.1x² - 9.2x - 10.3

• f(x) =
  2.1x² - 8.6x + 10.1

Using quadratic regression to write a quadratic function to represent the function of the graph.

Determine the curve of best fit. For this quadratic function.