Maths
Grade-10
Easy

Question

What function g describes the graph of f after the given transformation?
f(x) = IxI; vertically stretched by a factor of 3 and reflected across the x-axis.

  1. f(x) = 3IxI
  2. f(x) = (1/3)IxI
  3. f(x) = -Ix/3I
  4. f(x) = -3IxI

hintHint:

Vertically stretched by a factor means where we have to multiply the function with a factor.
Reflected across the x-axis means the sign of the function changes.

The correct answer is: f(x) = -3IxI


    Vertically stretched by a factor 3 means a = 3. So, f(x) becomes 3IxI
    Reflected across the x-axis means f(x) becomes -3IxI.
    Function: f(x) = -3IxI

    Know what the terms vertically stretching and reflection means.

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