# Interpreting Line Graphs Worksheet

There are many interpretive line graphs to choose from for an interpreting line graph worksheet. As the name implies, these charts display a series of line graphs which can be interpreted to make a certain point. You can also use them to study specific variables of a relationship, such as the slope of a line between two variables. Some examples include:

A regression line is simply a line graph with one or more explanatory variables at its ends. Regression is used when you want to draw a line from one variable to another. In a regression line, the x-intercept is the beginning value and the slope is the end value. These lines are used to explain the variation in the variable. There are different regression techniques, including the polynomial and lognormal regression.

A ‘skewness’ line graph represents a regression line that shows the slopes between the two explanatory variables. The slope is the percentage of the variability of the variable that can be explained by the variable. Skewness is the percentage change between the X-axis (end value) and the Y-axis (beginning-value). This is often called a ‘shameless graph’ because the y-axis is hidden by the line. The shaded area denotes the range of explanatory power.

For a linear regression, the x-intercept is plotted and the y-intercept is also plotted. The values of the x-intercept and y-intercept are plotted in an inverted manner so that the x-axis becomes the horizontal axis and the y-axis become the vertical axis. The slope of the line between the x-axis and the y-axis is the slope coefficient.

A zigzag line is an irregular line with a variety of angles in it. The lines are often used to show slopes. Themain problem with zigzag lines is that they do not always follow the expected lines. These curves, sometimes called ‘parametric’ are not normally used in the interpretation of line graphs.

Nested curves are lines with variable points in between the lines. The variable points to define the region where the slope can vary. The curve can have many nested points. In many instances, these are used to visualize the variation of the slope of the line, but they are not used for interpretation.

The best way to interpret interpretive line graphs is through a scatter plot. A scatter plot is just a regular plot where the x-axis is measured on a log scale and the y-axis is measured on a log scale. For the x-axis, you can use standard units, inches, metric units, kilometers, etc. For the y-axis, you can use standard units, yards, miles, and so on.

To use interpretive line graphs, all you need to do is open up a graphing program and find a scatter plot. You then need to find the left edge of the scatter plot. Then, you need to add a line with a slope at the bottom right corner of the line. Remember, if you put the line right before the x-axis, the line will get truncated, and if you put the line right after the x-axis, the line will be off the center of the plot.