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Interpret Graphs of a Coordinate System
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Once you understand how to read and plot points on a coordinate system, you have the tools to start interpreting data. Data is used in every industry when making decisions. It is very important for us to know how to understand data. The following videos demonstrate interpreting data from a graph.

Interpreting Information on a Graph
Interpreting a Graph (Average Temperatures)

Pay attention to the axis labels. These are the labels on the x- and y-axis. They tell you what the data means and the units the data is using.

### Practice Problems

Use the following graph to answer questions 1 through 5. This graph shows information about various bottles of spices for sale at a market. The x-axis gives the amount of the spice in the container (in ounces) and the y-axis gives the price of the container.
1. Which of these spices comes in a container with the lowest number of ounces? (
Solution
Solution: Thyme
Details:
We are comparing how many ounces are in each container, so we need to look at the corresponding measurements on the x-axis. We can approximate how many ounces by looking at the x-value for each spice. As you can see the Thyme has the lowest number of ounces.
)
1. Thyme
2. Salt
3. Sage
4. Black Pepper
5. Nutmeg
2. Which of the spices has the highest price per container? (
Solution
Solution:
Nutmeg
)
1. Thyme
2. Salt
3. Sage
4. Black Pepper
5. Nutmeg
3. Which spice is shown at the point ($$0.75, 5$$)? (
Solution
Solution:
Oregano
)
1. Salt
2. Oregano
3. Black Pepper
4. Cinnamon
4. What is the price of a container of garlic salt at this market (in dollars)? (
Solution
Solution:
About $$7.50$$
Details:
Since we are trying to find the cost of garlic salt, we need to find out the corresponding y-value. It helps to draw a horizontal line through the point representing garlic salt on the graph to estimate the cost per container. The dashed line crosses the y-axis at about $$7.50$$, so we can estimate that this is the cost of the container of Garlic Salt.
)
5. How many ounces are there in the container of cinnamon sold at this market? (
Solution
Solution:
About $$2.25$$
)

## Need More Help?

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