this type of visual aid illustrates how one variable changes as a function of another by using a horizontal and vertical axis to show the changes in the two variables.
a. flowchart
b. columnar chart
c. line graph
d. pie graph
e. bar graph
Expert Answer
A line graph is the type which uses a horizontal and vertical axis namely x and y axis to represent two variables and show how one changes with the other. a flowchart is step by step procedure to explain a problem.A columnar chart uses tables to explain thegiven data. A pie diagram is a circular representation and a bar diagram uses rectangular bars to represent data. So the answer is option c.