5
practice testMultiple Choice

Practice Test

Question 5 • Statistical Reasoning

Bacteria growth was measured over a one-month period. Scatterplot A displays the number of cells measured over the recorded number of days. Two transformations of the data are shown in the next two graphs. Scatterplot B displays the relationship between the number of days and the natural log of the number of cells of bacteria. Scatterplot C displays the relationship between the natural log of the number of days and the natural log of the number of cells of bacteria. Open image in full-screen view Open image in full-screen view Open image in full-screen view Which model best represents the relationship between the number of days and the number of cells of bacteria?

Answer
A
A linear model would best represent the relationship because scatterplot B is fairly linear.
B
A linear model would best represent the relationship because scatterplot A is fairly linear.
C
A power model would best represent the relationship because scatterplot C is fairly linear.
D
An exponential model would best represent the relationship because scatterplot B is fairly linear.
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