Which statement best describes a sketch graph?

• A. A line graph that shows the general shape of the relationship without plotting individual data points, with labelled axes.
• B. A bar chart with exact data values.
• C. A histogram showing frequency distributions.
• D. A pie chart showing proportions.

Answer: (A)

Sketch graphs are rough visual representations used to show the overall trend between two variables. They focus on the general shape of the relationship rather than exact data points. In a sketch graph, you draw a line that conveys how the variable changes with the other, with the axes clearly labeled so you know what quantities are being compared and the scales. This makes it easy to see whether the relationship is increasing, decreasing, or has a peak, without needing to plot every point. The other chart types aren’t about showing a trend in this way: a bar chart presents exact values for different categories, a histogram shows frequencies for data ranges, and a pie chart displays parts of a whole.