Math Problem Statement
Starting with the graph of
π
(
π₯
)
=
3
π₯
, write the equation of the graph that results when:
(a)
π
(
π₯
)
is shifted 5 units upward.
π¦
=
(b)
π
(
π₯
)
is shifted 8 units to the left.
π¦
=
(c)
π
(
π₯
)
is reflected about the x-axis and the y-axis.
π¦
=
Solution
Let's analyze the given transformations step by step. The original function is:
(a) Shift 5 units upward:
To shift a function upward by units, you add to the function. In this case, the shift is 5 units upward, so the new function is:
(b) Shift 8 units to the left:
To shift a function to the left by units, you replace with in the function. Since the shift is 8 units to the left, you substitute with , so the new function is:
Expanding this:
(c) Reflection about the x-axis and y-axis:
- Reflection about the x-axis: Multiply the function by .
- Reflection about the y-axis: Replace with .
Applying both transformations to the original function :
- Reflecting about the x-axis gives .
- Reflecting about the y-axis gives .
Combining both reflections, we get:
However, reflecting about both axes will result in the original function since it gets reversed twice.
Therefore, after reflecting about both axes, the equation remains:
Summary of results:
- (a) Shift 5 units upward:
- (b) Shift 8 units to the left:
- (c) Reflected about the x-axis and y-axis:
Would you like more details or clarification?
Here are 5 related questions to explore further:
- How would the equation change if the function were shifted 5 units downward instead of upward?
- What would happen if the function were shifted 8 units to the right instead of to the left?
- How do you reflect a function about the y-axis alone?
- How does the slope change under different transformations?
- What is the effect of combining shifts and reflections?
Tip: When applying transformations to a graph, always think of shifts as changes to the inputs (horizontal) or outputs (vertical) and reflections as flipping the graph across an axis.
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Math Problem Analysis
Mathematical Concepts
Linear Functions
Graph Transformations
Formulas
Vertical shift: y = f(x) + c
Horizontal shift: y = f(x + c)
Reflection over x-axis: y = -f(x)
Reflection over y-axis: y = f(-x)
Theorems
Transformation Theorems in Coordinate Geometry
Suitable Grade Level
Grades 8-10