Question

1. this line graph compares the growth of plants that were kept in the sun for different amounts of time.

key:
1 hour of sunlight
3 hours of sunlight
6 hours of sunlight
9 hours of sunlight
height (mm)
day plant measured
a) on day 7, the plants kept in the sun for 3 hours were how tall?

b) on day 7, the plants kept in the sun for 6 hours were how tall?

c) on day 10, the plants kept in the sun for 9 hours were how tall?

d) on day 11, the plant that was grown with 1 hour of sunlight was how tall?

e) based on the graph, the plant grows best in what amount of sunlight?

Explanation:

Step1: Locate Day7, 3hrs sunlight

Find intersection of Day7 x-axis and 3hrs line: height = 20 mm

Step2: Locate Day7, 6hrs sunlight

Find intersection of Day7 x-axis and 6hrs line: height = 70 mm

Step3: Locate Day10, 9hrs sunlight

Find intersection of Day10 x-axis and 9hrs line: height = 140 mm

Step4: Locate Day11, 1hr sunlight

Find intersection of Day11 x-axis and 1hr line: height = 12 mm

Step5: Compare max heights of all lines

9hrs sunlight line has highest final height (160 mm on Day11)

Answer:

a) 20 mm
b) 70 mm
c) 140 mm
d) 12 mm
e) 9 Hours of Sunlight