Students build four electromagnets and test them by picking up metal tacks. Here are their partial results.
12 coils 4 tacks
24 coils 9 tacks
36 coils 13 tacks
48 coils ? tacks
Which is the best prediction for the number of nails the electromagnet with 48 coils will pick up? (1 point)
• 13 tacks
• 12 tacks
16
20
Based on the given data, we can see that as the number of coils increases, the number of tacks picked up also increases. If we average the number of tacks per coil for the first three electromagnets, we get an average of 13 tacks per 12 coils. Therefore, we can predict that the electromagnet with 48 coils will pick up approximately 48/12 * 13 = 52 tacks.
Since none of the given answer choices match this prediction, we cannot make an accurate prediction based on the given data.