1. Circle the two bulbs you picked.
2.
3. Practice: Summarizing (3 points)
Fill in the blanks.
The energy usage of a light bulb is a function. The input for the function is _________, measured in hours.
The output of the function is energy usage, measured in ____________.
Identify the functional relationship between the variables. _________________ is a function of _________________.
The graph of the function will show energy usage on the _____________ axis and time on the _______________ axis.
4. Practice: Organizing Information (2 points)
Use the data given to complete the table for your first bulb.
DATA TABLE A
Time (hours)
x Energy (kWh)
y Point (time, energy)
(x, y)
3
10
5. Practice: Organizing Information (2 points)
Use the data given to complete the table for your second bulb.
DATA TABLE B
Time (hours)
x Energy (kWh)
y Point (time, energy)
(x, y)
3
10
6. Practice: Organizing Information (5 points: 1 point for labels, 2 points for each graph)
Label the axes of the graph with "Time (hours)" and "Energy (kWh)." Plot the points from table A on the graph. Connect the points with a line. On the same graph, plot the points from table B and connect them with a line.
7. Practice: Summarizing (1 point)
Classify each of your graphs as increasing, decreasing, or constant.
First bulb: ___________________
Second bulb:___________________
8. Practice: Summarizing (2 points)
Fill in the blanks.
First bulb: When 3 is the input, the output is _____. When 10 is the input, the output is _______.
Second bulb: When 3 is the input, the output is _____. When 10 is the input, the output is _______.
9. Practice: Summarizing (1 point)
The workers leave the lights on in the break room for stretches of about 3 hours. Which light bulb would light this room using the least amount of energy?
10. Practice: Summarizing (1 point)
The lights in the main room of the factory stay on for stretches of 9 hours. Which kind of light bulb would light this room with the least amount of energy?
