A direct variation function has a graph that is a straight line passing through the origin. If the line passes through the point (3, 9), the constant of variation k is _________.
Answer & Analysis
Analysis
Question Analysis
This question tests the student's ability to determine the constant of variation from a given point on the graph of a direct variation function.
Key Concept Explanation
In a direct variation, the relationship between two variables and is given by . The constant of variation can be found by using any point on the graph, as
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