Final answer:
To construct a bar graph comparing the number of sprouts in the experimental group to the control group at the end of three weeks, plot the number of sprouts for each type of plant (sunflowers and birch trees) for each group on the same graph, and label the axes and provide a key or legend.
Step-by-step explanation:
To construct a bar graph to compare the number of sprouts in the experimental group to the number of sprouts in the control group at the end of three weeks, follow these steps:
i) First, plot the number of sprouts of each type of plant (sunflowers and birch trees) for the experimental group at the end of three weeks. This means that you will have two bars, one for sunflowers and one for birch trees, on the graph. The height of each bar will represent the number of sprouts for that plant.
ii) Then, on the same graph, plot the number of sprouts of each type of plant (sunflowers and birch trees) for the control group at the end of three weeks. Again, you will have two bars, one for sunflowers and one for birch trees, on the graph.
Make sure to include labels for the x-axis (types of plants) and y-axis (number of sprouts) and provide a key or legend to distinguish between the experimental group and the control group.