Imagine that you're moving to a new home in arizona, near the area shown in this photo. your new area has a warm climate. it's also very dry, and it receives little rainfall. animals have learned how to survive without many sources of water, and plants have learned to adapt to intense summers with high temperatures.

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one