26.5k views
2 votes
Given the transformation g(x) = -2(3x - 1) + 4 and given that (8,5) is a point on the

graph off, which of the following must be a point on the graph of g ?
A.(5,-2)
B.(-6,3)
C.(-2,5)
D.(3,-6)

User Braj
by
8.2k points

1 Answer

5 votes

Final answer:

To find the corresponding point on the graph of g, we must apply the transformation g(x) to the original x-value of the point (8,5) on f, which involves scaling, shifting, and inversing operations. The point (8,-6) is the result of the transformation, making option D the correct choice.

Step-by-step explanation:

To solve this problem, we need to apply the given transformation g(x) = -2(3x - 1) + 4 to the x-coordinate of the point (8,5), which belongs to the graph of the function f. This transformation scales the x-coordinate by a factor of 3, shifts it by -1, scales the resulting y-value by -2, and then shifts it upwards by 4 units. Let's apply this step-by-step:

  • First, scale and shift the x-coordinate: 3(8) - 1 = 24 - 1 = 23.
  • Then, apply the -2 scale to the y-coordinate of f: -2(5) = -10.
  • Finally, add the upward shift of 4 to the y-value: -10 + 4 = -6.

Now, we use the transformed x-value (23) as the input to our function g. However, we typically look for an x-value that is within the domain of normal function representation, so we need to find the original x-value before the transformation was applied to it. To find this, we do the inverse of the transformation to the x-value: (23+1)/3 = 24/3 = 8. Thus, the point on the graph of g corresponding to the original x-value of 8 will have the coordinates (8,-6), meaning that option D is the correct answer.

User Anoush Hakobyan
by
8.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories