Math Problem Statement

Math problems involving transformations and reflections in coordinate geometry.

Solution

I see that you have uploaded an image with several math exercises. I will help you solve these problems one by one. Let's begin by tackling each question in order.

1. Determine the result of the transformation:

y=2x+6shifted 8 units down.y = 2x + 6 \quad \text{shifted 8 units down.} Solution: Shifting the function down by 8 units affects the constant term: y=2x+68=2x2.y = 2x + 6 - 8 = 2x - 2.

2. Determine the result of translating point H=(2,3)H = (2, -3) by the vector T=(42)T = \begin{pmatrix} 4 \\ -2 \end{pmatrix}.

Solution: Translation means adding the components of the vector TT to the coordinates of point HH: H=(2+4,3+(2))=(6,5).H' = (2 + 4, -3 + (-2)) = (6, -5).

3. The graph of y=x2+bxy = x^2 + bx is shifted 2 units to the right. Determine the equation after this transformation.

Solution: A shift of 2 units to the right corresponds to replacing xx with (x2)(x - 2) in the equation: y=(x2)2+b(x2).y = (x - 2)^2 + b(x - 2). Expanding: y=(x24x+4)+b(x2)=x2+(b4)x+(42b).y = (x^2 - 4x + 4) + b(x - 2) = x^2 + (b - 4)x + (4 - 2b). So, the transformed equation is: y=x2+(b4)x+(42b).y = x^2 + (b - 4)x + (4 - 2b).

4. Determine the reflection of point A(2,3)A(2, 3) with respect to various axes and lines:

  • a) With respect to the x-axis: Reflection over the x-axis changes the sign of the y-coordinate: A=(2,3).A' = (2, -3).
  • b) With respect to the y-axis: Reflection over the y-axis changes the sign of the x-coordinate: A=(2,3).A' = (-2, 3).
  • c) With respect to the line y=xy = x: Swap the coordinates of the point: A=(3,2).A' = (3, 2).
  • d) With respect to the line y=xy = -x: Swap and negate the coordinates: A=(3,2).A' = (-3, -2).
  • e) With respect to the origin (0, 0): Negate both coordinates: A=(2,3).A' = (-2, -3).
  • f) With respect to the line x=2x = 2: The reflection across x=2x = 2 means the x-coordinate is unchanged: A=(2,3).A' = (2, 3).
  • g) With respect to the line y=1y = 1: The reflection across y=1y = 1 changes the y-coordinate according to the line: A=(2,2×13)=(2,1).A' = (2, 2 \times 1 - 3) = (2, -1).

5. Given f(x)=x2+x2f(x) = x^2 + x - 2, find the reflection of f(x)f(x):

  • a) Across the x-axis: Reflection over the x-axis changes the sign of the function: f(x)=(x2+x2)=x2x+2.f'(x) = -(x^2 + x - 2) = -x^2 - x + 2.
  • b) Across the y-axis: Reflection over the y-axis means replacing xx with x-x: f(x)=(x)2+(x)2=x2x2.f'(x) = (-x)^2 + (-x) - 2 = x^2 - x - 2.

Do you need detailed explanations for any of these steps or solutions?

Here are five related questions to expand your understanding:

  1. How do we perform a vertical stretch or compression on the function y=2x+6y = 2x + 6?
  2. How would the result change if the translation vector TT in question 2 were T=(35)T = \begin{pmatrix} -3 \\ 5 \end{pmatrix}?
  3. What effect does shifting the graph of y=x2y = x^2 by 5 units to the left have on its equation?
  4. How would the reflection of A(2,3)A(2, 3) look with respect to the line y=x+1y = x + 1?
  5. What happens to a function f(x)f(x) if it undergoes a horizontal stretch by a factor of 2?

Tip: When reflecting a point or graph, always identify which coordinate or expression is changing to avoid confusion!

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Function Transformations
Reflections
Translations

Formulas

Translation: H' = (x + a, y + b) for vector (a, b)
Reflection over x-axis: y -> -y
Reflection over y-axis: x -> -x
Reflection over y = x: swap coordinates (x, y) -> (y, x)
Reflection over y = -x: swap and negate (x, y) -> (-y, -x)

Theorems

Translation Theorem
Reflection Theorem

Suitable Grade Level

Grades 10-12