Look at Table 7.2, which shows the amount of growth hormone secreted by the pituitary gland at different ages.
Table 7.2 Amount of growth hormone secreted by the pituitary gland at different ages
Age Growth hormone (micrograms)
10 1 900
20 600
30 350
40 300
50 250
60 200
70 175
80 170
90 150
Plot a line graph to show the change in the amount of growth hormone secreted with age.
Describe the shape of the graph.
The line graph showing the change in the amount of growth hormone secreted with age would have age on the x-axis and growth hormone (in micrograms) on the y-axis. The points on the graph would be plotted based on the data given in Table 7.2.
As for the shape of the graph, it would show a gradually decreasing trend. At age 10, the amount of growth hormone secreted is the highest at 1,900 micrograms, and as age increases, the amount gradually decreases. There is a significant drop between ages 10 and 20, with a decrease from 1,900 to 600 micrograms. The decrease continues in a more gradual manner as age increases, reaching its lowest point at age 90 with 150 micrograms. Therefore, the graph would show a downward trend from left to right, indicating a decrease in growth hormone secretion with increasing age.