Need help with the ones I got wrong. The other persons did not answer correctly.

Question 1 | 0 / 20 points |

The following table shows total forest and timber land in the United States in millions of acres in the indicated year.

Year |
1962 ## Get Assignment Writing HelpOur experts are ready to complete your assignment, course work. essay, test, dissertation, research paper, quiz Get Started |
1970 |
1977 |
1987 |
1992 |

Timberland |
759 |
754 |
737 |
731 |
737 |

A scatter plot of this data is shown below.

The horizontal variable is the number of years since 1962 and ranges between 0 and 30. Use quadratic regression to find a quadratic function to model the data. Enter your answer in the form *y* = *ax*^2+*bx*+*c,*where *a*, *b*, and *c* have been rounded to three decimal places.**Important note:** Do not include spaces in your answer and use the “^” symbol for exponentiation just as on the calculator.

Answer: | y=-65.504x^2+ 954.658x – 2114.460 |

Question 2 | 0 / 20 points |

The following table shows total forest and timberland in the United States in millions of acres in the indicated year.

Year |
1962 |
1970 |
1977 |
1987 |
1992 |

Timber Land |
759 |
754 |
737 |
731 |
737 |

Calculate the SSE for the quadratic regression function (with coefficients rounded to three decimal places) from the previous question. Round your answer to one decimal place.

Answer: | 0.036 X^2 -142.337 X +141432.488 |

Question 3 | 0 / 20 points |

Use the quadratic regression function (with coefficients rounded to three decimal places) to estimate the acerage of timberland in 1982. Round your answer to one decimal place.

Answer: | 627.2 |

Question 4 | 20 / 20 points |

Given four different data sets, a student calculates the quadratic regression as well as the R^{2} value for each using a TI-83. Which of these results models its respective data the best?

Question options:

a = 1.23 b = -3.27 c = 7.83 R |

a = -3.745 b = 9.524 c = 12.105 R |

a = 142.3629 b = 204.2284 c = -428.2079 R |

a = 35.29 b = 29.94 c = -10.23 R |

Question 5 | 20 / 20 points |

Given the three points (0,2), (1,-3) and (2,-5) find the formula for the parabola that contains all three points.

Question options:

y = .05x |

y = .04x |

y = 1.5x |

y = 1.5x |

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