Sarah performs an experiment to see whether bees prefer red flowers or yellow flowers. Look at this table of results from the experiment. Number of bees found on yellow flowersNumber of bees found on red flowersDay 11214Day 21020Day 31418Day 41215What is the independent variable in this investigation?

The independent variable is the factor Sarah changes to test its effect. She compares flowers of two colors, red and yellow, and observes how many bees are on each. Therefore, the independent variable is the color of the flower, not the number of bees measured.

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