Line graphs show progress and trending by joining data points with a line. Which of the following best describes this technique?

• A. Plotting data as bars.
• B. Joining data points with a line.
• C. Using heat map shading.
• D. Coloring regions under a chart.

Answer: (B)

When you want to show progress or a trend over time, you connect each data point with a line. That line creates a continuous path that reveals how the value changes from one point to the next, making increases, decreases, and the overall direction easy to read at a glance. The slope between points communicates the rate of change, so you can easily spot which periods saw sharp gains or declines.

Plotting data as bars, by contrast, treats each point as a separate category and highlights exact values rather than how they move along a sequence. Heat map shading encodes intensity with color across a grid, not a connected trajectory over time. Coloring regions under a chart emphasizes area or total accumulated value rather than a smooth progression. So the method that best describes showing progress by joining data points with a line.