To determine if the relation \( y = 4x - 1 \) is a function, we can follow these steps:
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Graph the Relation: The equation \( y = 4x - 1 \) is a linear equation, which represents a straight line with a slope of 4 and a y-intercept of -1.
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Apply the Vertical Line Test: The vertical line test is a method used to determine whether a relation is a function. If a vertical line intersects the graph at more than one point, then the relation is not a function.
Since \( y = 4x - 1 \) is a linear equation and represents a straight line, any vertical line drawn will intersect the line at exactly one point.
Based on these observations:
- Does the graph pass the vertical line test? Yes, any vertical line intersects the graph at most one time.
Therefore, the relation \( y = 4x - 1 \) is indeed a function.
Final answer: Yes.