In this lesson, we learn how to find the rate of change from a graph, specifically with linear graphs. The rate of change is defined as a ratio of the change in two quantities, which is the slope of the graph. We can find the slope by taking the difference between two y-values and two x-values, or by visually examining the graph and counting the change in y and x values from left to right or right to left. Both methods will give us the same slope.
Finding the rate of change from a graph
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Questions answered by this video:
How do I find the rate of change (slope) of a line by looking at a graph?
How do I find the rate of change (slope) of a line algebraically?
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This lesson teaches how to find the slope of a line 2 ways:
1. Algebraically, using 2 points on the line
2. By looking at the graph