We are given that the point $(8, -5)$ lies on the graph of $f(x)$. We are also given the transformation $g(x) = 2f(x-4) + 6$. We need to find the corresponding point on the graph of $g(x)$.

AlgebraFunctionsTransformations of FunctionsGraphing
2025/6/12

1. Problem Description

We are given that the point (8,5)(8, -5) lies on the graph of f(x)f(x). We are also given the transformation g(x)=2f(x4)+6g(x) = 2f(x-4) + 6. We need to find the corresponding point on the graph of g(x)g(x).

2. Solution Steps

Let (x,y)(x, y) be a point on the graph of f(x)f(x). This means y=f(x)y = f(x). We are given that (8,5)(8, -5) is on the graph of f(x)f(x), so f(8)=5f(8) = -5.
Now consider the function g(x)=2f(x4)+6g(x) = 2f(x-4) + 6. Let (a,b)(a, b) be a point on the graph of g(x)g(x), which means b=g(a)b = g(a). Substituting the expression for g(x)g(x), we have b=2f(a4)+6b = 2f(a-4) + 6.
We want to relate this to the point (8,5)(8, -5) on the graph of f(x)f(x). We have f(8)=5f(8) = -5. We want to find a value of aa such that a4=8a-4 = 8. Solving for aa, we get a=8+4=12a = 8+4 = 12.
Substituting a=12a=12 into the equation for bb, we have
b=2f(124)+6=2f(8)+6=2(5)+6=10+6=4b = 2f(12-4) + 6 = 2f(8) + 6 = 2(-5) + 6 = -10 + 6 = -4.
So the corresponding point on the graph of g(x)g(x) is (12,4)(12, -4).

3. Final Answer

(12, -4)