Answers to Practice Opportunities

3.

Answers: y = 1.54 + 0.91x; r = 0.99; the mean of y = 2.33

Solution:

[ON]

[2ndF] [DRG] [2]

[2ndF] [DEL]

Enter Data

[1] |
[STO] |
[3] |
[2ndF] [STO] |
[1] [2] |
[M+] |

[3] |
[STO] |
[4] |
[2ndF] [STO] |
[1] |
[M+] |

[5] |
[STO] |
[6] |
[2ndF] [STO] |
[7] |
[M+] |

[2] |
[STO] |
[3] |
[2ndF] [STO] |
[1] [3] |
[M+] |

[3] |
[STO] |
[5] |
[2ndF] [STO] |
[0] |
[M+] |

[+/-] [7] |
[STO] |
[+/-] [5] |
[2ndF] [STO] |
[6] |
[M+] |

Press [RCL][(] and your display will tell you that the a is 1.539285357

Press [RCL] [)] and your display will tell you that the b is 0.910819738

Press [RCL] [**÷**] and your display will tell you that the r is 0.993456779

Press [RCL] [7] and your display will tell you that the mean of y is 2.333333333