This graph shows the relationship between how much you eat and how hungry you are. It's an inverse relationship, because the more you eat, the less hungry you become. For example, if you eat 1/5 of your plate, you're still pretty hungry. If you continue to eat, say to 4/5 of your plate, you're now less hungry.
This graph depicts a direct relationship, because the more you sleep the more awake you are the next day. More sleep means more energy the next day! as the independent variable increases (the hours spent sleeping) so does the dependent variable (energy levels the next day.)
A squared relationship, like in this graph, shows how the y value is proportional to the square of the x value.
A square root relationship is just like a squared relationship, except in this case the y value is squared and the x value is not. The x and y values are still proportional.
This graph shows a linear relationship. A linear relationship shows that the independent variable has no affect on the dependent variable. Even as the x value increases, the y values stays the same.
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