Unit 4

From unit 4, we learned about two dimensional graphs. These graphs are different from the one dimensional ones we were just taught this past week. One dimensional graphs only has a change in one of the axis, therefore all variables are being controlled except for the one you are testing. For example, if you were rolling a pencil to your friend on the other side of the desk, the variable being held constant is the time (seconds) it is taking to roll, while the one changing would be the distance, you would take the distance for every second being tracked. With two dimensional graphing, there are changes going on in both the y and x axes.
This summer when I went to a beach named cockroach cove, I found millions of little hermit crabs all huddled up against a rock. Amazed at how many there were, I picked off a lot and placed them in my hand to take a picture. As they got less frightened of me and came out of their shell, they all started walking off my hands. As they fell back into the water, I watched them crawl back to their families and back into hiding. With two dimensional graphs, we can show what goes on here. We graph what is going on horizontally and vertically. Horizontally, the velocity never changes of the walking hermit crabs because they don't really accelerate, just waddle off my palm. They traveled a distance which we could find out with our formulas. While on the y-axis, the distance would be the vertical drop from my hand to the water, and velocity would start at zero and gain with the acceleration of gravity (-9.8 meters per seconds squared). If I were to do all these measurements, I would be able to find the spot where the hermit crab would hit the water and the time it would take from my hand to breaking the water would take. After learning about these two dimensional graphs, they really help with graphing out these real life scenarios.