Absolute Value Ff0403
1. **State the problem:** We are given the function $$h(x) = -4|x - 5|$$ and need to identify the value of $$a$$ and the vertex of the graph.
2. **Formula and explanation:** The general form of an absolute value function is $$f(x) = a|x - h| + k$$ where:
- $$a$$ controls the vertical stretch/compression and reflection.
- $$(h,k)$$ is the vertex of the graph.
3. **Identify the value of $$a$$:** In $$h(x) = -4|x - 5|$$, the coefficient $$a = -4$$.
- The negative sign means the graph is reflected over the x-axis (opens downward).
- The absolute value causes a V-shaped graph.
- The number 4 means the graph is vertically stretched by a factor of 4.
4. **Find the vertex:** The expression inside the absolute value is $$x - 5$$, so $$h = 5$$.
- Since there is no $$+k$$ outside the absolute value, $$k = 0$$.
- Therefore, the vertex is at the point $$(5,0)$$.
5. **Summary:**
- The value of $$a$$ is $$-4$$.
- The vertex is at $$(5,0)$$.
This matches the description: a V-shaped graph, vertically stretched by 4, reflected over the x-axis, vertex at (5,0), opening downward.