In an experiment, tommy dropped water onto the head of a penny to see how many d

Question

In an experiment, tommy dropped water onto the head of a penny to see how many drops would fit before spillin over. the data recorded in his data table included the number of drops for three different trials. which of the following statements are true?
1. tommys experiment includes hidden variables such as how much pressure to put on
the dropper
2. the dependent variable in tommys experiment is the number of drops that fit on the penny
3. a graph of tommys experiment would show the number of drops(the dependent variable) on the y- axis.
1 only? 2 only? 3 only? 1 and 2 only? or 1, 2, and 3 only?

Explanation / Answer

1, 2, and 3 are correct...the pressure on the dropper is called a "confounding variable" and affects the results if it is not held constant. The dependent variable (or the response variable) is the number of drops that fit on the penny and is the quantity that is being tested. Finally, the dependent variable always lies on the y-axis in a graph.

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