Which graph is commonly used to measure change over time?

Which graph is commonly used to measure change over time?

• A. Line Graph
• B. Scatter Plot
• C. Bar Graph
• D. Pie Chart

Answer: (A)

To show how something changes over time, a line graph is the best choice. It places time on the horizontal axis and the measurement on the vertical axis, and it connects the data points with a line. That line highlights trends—whether values rise, fall, or stay steady—so you can see the pattern at a glance, like temperatures or stock prices over several days. Other graphs serve different purposes: a scatter plot shows how two variables relate to each other, not specifically time; a bar graph compares amounts across distinct categories, not a continuous progression; and a pie chart shows how a whole is divided into parts, not how it changes over time.

To show how something changes over time, a line graph is the best choice. It places time on the horizontal axis and the measurement on the vertical axis, and it connects the data points with a line. That line highlights trends—whether values rise, fall, or stay steady—so you can see the pattern at a glance, like temperatures or stock prices over several days.

Other graphs serve different purposes: a scatter plot shows how two variables relate to each other, not specifically time; a bar graph compares amounts across distinct categories, not a continuous progression; and a pie chart shows how a whole is divided into parts, not how it changes over time.