Use the titles of the vertical and horizontal axes of a line graph to understand the plotted points on it. The horizontal axis reflects an independent variable, such as time elapsed or occurrences of an event, while the vertical axis reflects the effect of that variable on a different factor.
One example of a line graph could track the temperature of a particular place over time. The horizontal axis could reflect the time of day, with marks set up every 15 minutes, every hour, every six hours or the time periods at which measurement of the temperature is desired.
Measuring the temperature at the assigned time provides the information for the points on the graph. The marks going up the vertical axis could begin at zero and go several degrees above the highest temperature that the area generally receives at that time of year; if the temperature goes below zero, then the vertical axis range should include negative numbers. At each assigned time, measuring the temperature provides the coordinates for the point. At 8:00 p.m., if the temperature is 55 degrees Fahrenheit, then the right point to plot would sit above 8:00 p.m. on the horizontal axis and at 55 degrees Fahrenheit on the vertical axis. At the next point in time on the horizontal axis, measuring the temperature again provides the next point. Connecting the points with a line completes the line graph.
Learn MoreAccording to the Cambridge Dictionary, a broken line graph is "a graph that shows information as dots that are connected by straight lines." These graphs do not necessarily form an overall straight line. Each data point is often a vertex where the line makes a change in direction.
Full Answer >A frequency polygon is a line graph that represents the shapes of the statistical distributions. To draw the graph, simply construct a histogram, and join the middle top points of the bars of the histogram with a line. You need a pencil, a ruler and a piece of paper.
Full Answer >Graphing x = 3 is a matter of drawing a vertical line on the Cartesian plane. For any equation x = n, where n is any real number, the resulting graph is a vertical line crossing the x-axis at the value of n. To graph the given equation, draw the Cartesian plane, plot the coordinates of the graph, and draw a line through it.
Full Answer >The first step in graphing an inequality is to draw the line that would be obtained, if the inequality is an equation with an equals sign. The next step is to shade half of the graph.
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