Question

ms. riveras biology class wanted to investigate how the amount of sunlight affects the growth of bean plants. they planted identical bean plants in separate pots and exposed each group to different amounts of sunlight per day: 2 hours, 4 hours, 6 hours, and 8 hours. each week, they measured and recorded the average height of the plants in centimeters over a 5 - week period. below is the line graph showing the average height of plants receiving 6 hours of sunlight per day over the 5 weeks. plant height (cm) vs. week 5. how much did the plant grow between week 2 and week 4? 6 cm 4.5 cm 3 cm 5.5 cm

Explanation:

Step1: Read height at Week 2

From the graph, the height of the plant at Week 2 is 4.5 cm.

Step2: Read height at Week 4

From the graph, the height of the plant at Week 4 is 9 cm.

Step3: Calculate growth

Subtract the height at Week 2 from the height at Week 4. $9 - 4.5=4.5$ cm.

Answer:

4.5 cm