A graph that best represents the total hours Mallory worked over these 4 weeks include the following: C. graph C (top right).
In Mathematics and Statistics, a line plot is a type of graph that is used for the graphical representation of data set above a number line, while using crosses, dots, or any other mathematical symbol.
Based on the information provided, Mallory worked 13 hours during the first week, so the ordered pair (1, 13) must be on the line. Also, she whe worked 22 hours during the second week, which represents (2, 22).
During the third week, Mallory worked 18 hours, which is represented by (3, 18) and indicates a decrease in her work. Lastly, she worked 15 hours during the fourth week.