Final answer:
A scatter plot is used to represent data when there are two variables and you want to examine the relationship between them. It visually shows the distribution and pattern of the data points and helps identify trends, correlations, or outliers. In this scenario, the scatter plot can be used to analyze the relationship between texting speed and time.
Step-by-step explanation:
A scatter plot is used to represent data when there are two variables and you want to examine the relationship between them. In this case, the variables are texting speed in words per minute and time in minutes. The purpose of a scatter plot is to visually show the distribution and pattern of the data points. It helps to identify any trends, correlations, or outliers in the data. The independent variable in this scenario is time, because it is the variable that is being controlled or manipulated. The dependent variable is texting speed, because it is the variable that is being measured or observed. By plotting the texting speed against time on a scatter plot, you can see how texting speed changes over time and if there is any relationship between the two variables.