medium · SAT Math
A lab technician measures the number of bacteria in a culture every 2 hours, as shown below. Time (x, hours): 0 2 4 6 Bacteria count (y): 5 15 45 135 The x-values are equally spaced, with each step covering 2 hours. Based on the pattern, what is the bacteria count at x=8 hours?
- 45
- 225
- 405
- 1215
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