[d] [t] For the following system…

Bulbs | i (amps) | V (volts) |
---|---|---|

one | 0.30 | 3.0 |

two | 0.15 | 1.5 |

three | 0.10 | 1.0 |

[g]

The functions provided in the above chart are specified in more detail below. The format shown is the OpenOffice.org Calc format. If using Excel, substitute commas for the the semi-colons.

The first function finds the slope of a line with the y-intercept equal to 0

=LINEST(y-data;x-data;0)

The following two functions calculate the slope and intercept for any linear relationship.

=SLOPE(y-data;x-data)

=INTERCEPT(y-data;x-data)

Analyze the the data seen in the table and displayed on the chart. Only answer the questions for which the analysis is true.

1. _____ Does the data form a straight line or roughly close to a straight line? | |||

yes | no | ||

↓ | ↓ | ||

First analysis conclusion: There is a mathematical relationship. Second conclusion: The data is linear. | 2. _____ Does the data form a smooth curve or roughly close to a curve? | ||

2. _____ Is the y-intercept zero or close to zero? | yes | no | |

yes | no | ↓ | ↓ |

3. __________ Third analysis conclusion: The intercept is 0. Use the table and chart to find the slope and write the slope in the blank with the appropriate units. | 3. Third analysis conclusion: se the table and chart to find the slope __________ and intercept __________ with the appropriate units. | First analysis conclusion: There is a mathematical relationship. Second conclusion: The mathematical relationship is non-linear. | First and only analysis conclusion: There is probably not a mathematical relationship. |

4. Sketch the magnetic force field lines for a magnet below.

5. ____________________ A Haier microwave oven consumes 1250 Watts at 120 volts. What is the current in amperes used by the microwave?

6. ____________________ A Haier microwave oven consumes 1250 Watts at 120 volts. What is the resistance of the microwave in Ohms (Ω)?

Formulas

Voltage V = current i × Resistance r

Power = current i × Voltage V