To understand the transformation from the function \( f(x) = -x \) to \( f(x) = -x + 4 \), we can break it down step by step.
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Original Function: The graph of \( f(x) = -x \) is a straight line with a slope of -1 that passes through the origin (0, 0).
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Transformed Function: The transformed function \( f(x) = -x + 4 \) can be analyzed through its components.
- The term \(-x\) retains the same slope of -1 and the same orientation as the original function, meaning it still has the same line but simply translated.
- The \(+ 4\) indicates a vertical shift of the entire graph.
Transformation Description:
- Vertical Shift: The addition of 4 in the function \( -x + 4 \) shifts the graph vertically upward by 4 units. This means that every point on the line \( f(x) = -x \) will be moved up by 4 units.
Thus, the correct transformation from \( f(x) = -x \) to \( f(x) = -x + 4 \) is that the original function shifts vertically up 4 units.
Therefore, the answer is: the original function shifts vertically up 4 units.