Graphs having an equation in the form y = kx, is an example of direct variation.
The graph that represents a function with a direct variation is (b)
For a graph to represent a function with direct variation, the following must be true
The function must be a linear function
The slope of the function must not be 0 or undefined
The function must pass through the origin
The only graph that satisfies the three highlights above is graph (b)
Hence, the graph that represents a function with a direct variation is (b)
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