Math Problem Statement

What kind of transformation converts the graph of f(x)= – 5|x+2|+9 into the graph of g(x)= – 5|x–2|+9?

Solution

The transformation that converts the graph of f(x)=5x+2+9f(x) = -5|x+2| + 9 into the graph of g(x)=5x2+9g(x) = -5|x-2| + 9 is a horizontal translation.

Specifically, the graph is translated 4 units to the right.

Explanation:

  • The function f(x)=5x+2+9f(x) = -5|x+2| + 9 has the term x+2|x+2|, which means the graph of f(x)f(x) is a reflection of the basic absolute value function x|x| and then shifted 2 units to the left.
  • The function g(x)=5x2+9g(x) = -5|x-2| + 9 has the term x2|x-2|, which means the graph of g(x)g(x) is a reflection of the basic absolute value function x|x| and then shifted 2 units to the right.
  • To move from f(x)f(x) to g(x)g(x), the graph must be shifted 4 units to the right (from x=2x = -2 to x=2x = 2).

Would you like to see more details or have any questions about this transformation?

Here are 5 related questions:

  1. How would you describe the effect of the coefficient 5-5 on the graph of f(x)f(x)?
  2. What happens to the graph if you change the constant +9+9 to +12+12?
  3. How would the graph change if f(x)=5x+2f(x) = -5|x+2| was modified to f(x)=3x+2f(x) = -3|x+2|?
  4. What is the vertex of the graph of f(x)f(x) and g(x)g(x)?
  5. How does the graph of f(x)f(x) compare to the graph of f(x)=x+2f(x) = |x+2|?

Tip: Horizontal shifts are always in the opposite direction of the sign inside the absolute value.