Math Problem Statement

Graph the given functions, f and g, in the same rectangular coordinate system. Describe how the graph of g is related to the graph of f. f(x) =| x| g(x) = |x|-5

Solution

We are given two functions to graph and compare:

  1. f(x)=xf(x) = |x|, which is the absolute value function.
  2. g(x)=x5g(x) = |x| - 5, which is a transformation of the absolute value function.

Step 1: Graph of f(x)=xf(x) = |x|

The graph of f(x)=xf(x) = |x| is a V-shaped graph with its vertex at the origin (0,0). It has two linear pieces:

  • For x0x \geq 0, f(x)=xf(x) = x, which is a line with a slope of 1.
  • For x<0x < 0, f(x)=xf(x) = -x, which is a line with a slope of -1.

Step 2: Graph of g(x)=x5g(x) = |x| - 5

The function g(x)=x5g(x) = |x| - 5 is obtained by shifting the graph of f(x)f(x) downward by 5 units. This is because the "-5" outside the absolute value shifts the entire graph vertically.

Step 3: Relationship between the Graphs

  • The graph of g(x)g(x) is the same V-shape as f(x)f(x), but it is shifted down by 5 units.
  • The vertex of g(x)g(x) is at (0,5)(0, -5), whereas the vertex of f(x)f(x) is at (0,0)(0, 0).
  • The slopes of the two arms of the V-shape for both functions remain the same as in f(x)f(x).

I can also generate the graph if needed. Would you like a visual representation of these functions?

Relative Questions:

  1. What other transformations can we apply to absolute value functions?
  2. How does shifting a graph horizontally differ from shifting it vertically?
  3. How would the graph of g(x)=x+5g(x) = |x| + 5 compare to f(x)=xf(x) = |x|?
  4. How does the slope of the arms of the V-shaped graph affect its appearance?
  5. What happens to the graph of f(x)=xf(x) = |x| if we reflect it across the x-axis?

Tip: Vertical shifts in a function do not affect the slope or the horizontal position of the graph, only the vertical positioning.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Functions
Graph Transformations

Formulas

f(x) = |x|
g(x) = |x| - 5

Theorems

Vertical Shifts in Functions

Suitable Grade Level

Grades 8-10