Concept explainers
Interpretation:
The method to determine the slope of line graph needs to be explained.
Concept introduction:
The difference and trend in the data can be easily visualized via plotting graphs. This can be said that a visual display of data is its graph. There are three types of graphs:
- The parts of a fixed whole can be represented by a circle graph. The different parts are represented as percents where the entire circle represents 100%.
- The variation of a quantity across different categories can be represented by a bar graph.
- In the line graph, the intersection of data for two variables is represented by the different points.

Answer to Problem 97A
Slope of a line can be determined by dividing the difference of the two points on the y-axis by the difference of the two points on the x-axis.
Explanation of Solution
A graph is a visual display of the data. Slope of a line can be determined by dividing the difference of the two points on the y-axis by the difference of the two points on the x-axis. The points chosen must come from the line on the graph.
Slope=y2−y1x2−x1
Slope of a line can be determined by dividing the difference of the two points on the y-axis by the difference of the two points on the x-axis.
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