What is the effect of multiplying a function by a negative constant on its graph

Practice Questions

Q1
What is the effect of multiplying a function by a negative constant on its graph?
  1. It reflects the graph across the x-axis.
  2. It reflects the graph across the y-axis.
  3. It shifts the graph to the left.
  4. It stretches the graph vertically.

Questions & Step-by-Step Solutions

What is the effect of multiplying a function by a negative constant on its graph?
  • Step 1: Start with a function, for example, f(x). This is the original graph you want to analyze.
  • Step 2: Multiply the function by a negative constant, like -1. This gives you a new function, g(x) = -f(x).
  • Step 3: Understand what happens to the points on the graph of f(x). If a point is at (x, y), it will now be at (x, -y) on the graph of g(x).
  • Step 4: Notice that the y-values of all points on the graph are flipped. Positive y-values become negative, and negative y-values become positive.
  • Step 5: This flipping of y-values means that the entire graph is reflected across the x-axis.
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