Data Visualization Concepts
10 concepts · Grades 3-5, 6-8 · 3 prerequisite connections
Data visualization turns numbers into pictures that reveal patterns. Bar charts, histograms, box plots, and scatter plots each highlight different aspects of a dataset. Choosing the wrong display can hide the story the data is trying to tell, which is why matching the chart type to the data type matters as much as the numbers themselves.
This family view narrows the full statistics map to one connected cluster. Read it from left to right: earlier nodes support later ones, and dense middle sections usually mark the concepts that hold the largest share of future work together.
Use the graph to plan review, then use the full concept list below to open precise pages for definitions, examples, and related content.
Concept Dependency Graph
Concepts flow left to right, from foundational to advanced. Hover to highlight connections. Click any concept to learn more.
Connected Families
Data Visualization concepts have 24 connections to other families.
All Data Visualization Concepts
Pictograph
A pictograph (or picture graph) displays data using pictures or symbols, where each picture represents a specific quantity. For example, if 🍎 = 5 apples, then 🍎🍎🍎 means 15 apples. A key (legend) always tells you what each symbol represents.
Bar Graph
A bar graph is a chart that uses rectangular bars of different heights or lengths to compare quantities across distinct categories. Each bar represents one category, and the bar's length is proportional to the value it represents.
Line Graph
A line graph is a chart that uses points connected by straight line segments to show how a quantity changes over time or across a continuous variable. The horizontal axis typically represents time, and the vertical axis represents the measured value.
Line Plot (Dot Plot)
A line plot (also called a dot plot) is a diagram that displays data values as marks — usually X's or dots — stacked above their corresponding values on a number line. Each mark represents one data point, making it easy to see the frequency of each value.
Dot Plot
A dot plot is a statistical chart that displays the frequency of data values using dots stacked above a number line. Each dot represents one observation, making it easy to see clusters, gaps, and the overall shape of a distribution for small to medium datasets.
Pie Chart
A pie chart is a circular graph that shows how a whole is split into categories. Each sector represents a category, and the size of the sector is proportional to that category's share of the total.
Stem-and-Leaf Plot
A stem-and-leaf plot displays numerical data by splitting each value into a stem and a leaf. It shows the distribution of the data while keeping the original values visible.
Histogram
A histogram is a graph that groups numerical data into equal-width ranges (bins) and shows the frequency of values in each range using adjacent bars that touch. Unlike bar graphs, histograms display the distribution shape of continuous data.
Box Plot
A visual display of the five-number summary: minimum, first quartile (Q1), median, third quartile (Q3), and maximum.
Scatter Plot
A graph that plots pairs of numerical values as dots on a coordinate plane, revealing the relationship between two variables.