A group of students has been testing electromagnets in the lab. They made an electromagnet by wrapping copper wire around a nail. For one set of tests, they wrapped the wire around the nail 25 times. For the second set of tests, they wrapped the wire around the nail 50 times. They also have 4 different batteries: 1.5 V, 3.0 V, 4.5 V, 6.0 V, 7.5 V, 9.0 V, 10.5 V, and 12.0 V. They use their electromagnets to see how many paper clips each can pick up. 1.Identify the independent variable:
2.Identify the dependent variable:
3.On which axis will the independent variable be plotted? (Circle, highlight, or delete one) x y

For each electromagnet, three trials were conducted at each voltage. The data was recorded in the tables below. Calculate the average number of paper clips picked up (round your answer to the nearest ones).

25-turn Electromagnet
Battery VoltageNumber of Paper Clips Picked UpAverage
First TrialSecond TrialThird Trial
1.5 V576
3.0 V121214
4.5 V141716
6.0 V202625
7.5 V293228
9.0 V343636
10.5 V404041
12.0 V454246

50-turn Electromagnet

Battery VoltageNumber of Paper Clips Picked UpAverage
Trial 1 Trial 2 Trial 3
1.5 V10 1611
3.0 V282431
4.5 V303236
6.0 V445042
7.5 V575150
9.0 V687869
10.5 V807676
12.0 V919092

Graphing both sets of data on the same graph (you will have to use different colors to distinguish between each line/set of points and include a legend explaining what the colors represent), show the average number of paper clips each electromagnet picked up for each voltage tested.
You will need to determine which data to plot on the x-axis and which data to plot on the y-axis. You will also need to determine the scales for each axis – do not plot the data as the axis intervals – that is not the correct way to the graph. Once you have plotted the points, draw a line of best fit or a trend line to represent the line for each data set – do not do a connect the dots type of line Properly label the axes (your unit for the paper clips will be “each”) and give the graph a title. Remember to use as much of the graph paper as possible, do not cram the data into one small section of the graph paper.