These data are called variables. In this research the variables are length of exposure to sunlight and the number of surviving yeast colonies. These are two types of variables. The independent variable is data that influences the outcome of the experiment. Often the experimenter has control over this variable.
Time is a very common independent variable.
This data is plotted in the horizontal axis, x axis. In our research we are going to explore the relationship of exposure to UV and survival. Length of exposure is our independent variable. The dependent variable depends on the conditions of the investigation, and frequently on the independent variable. The dependent variable is sometimes refereed to as the outcome variable.