# How to know when to reflect over x axis

Contents

- 1 How do you tell if a graph is reflected over the x axis?
- 2 What is the rule for a reflection over the x axis?
- 3 How do you tell if a function is reflected over the y-axis?
- 4 What does reflection across x =- 2 mean?
- 5 What happens when you reflect over Y X?
- 6 How do you reflect over X?
- 7 What is the rule for Y X?
- 8 What is the rule of reflection?
- 9 How do you reflect a shape?
- 10 How do you find reflection?
- 11 How do you enlarge a shape?
- 12 How do you find area?
- 13 What is area formula?
- 14 What is perimeter and area?
- 15 What is the perimeter formula?
- 16 How do you find the perimeter with the area?
- 17 What is a perimeter in math?
- 18 How do you find the perimeter given the area?
- 19 How do you find perimeter with area and width?
- 20 How do you find the length and width if you have the area and perimeter?

## How do you tell if a graph is reflected over the x axis?

**How To: Given a function,**

**reflect**the**graph**both vertically and horizontally.- Multiply all outputs by –1 for a vertical
**reflection**. The new**graph**is a**reflection**of the original**graph**about the**x**–**axis**. - Multiply all inputs by –1 for a
**horizontal reflection**.

## What is the rule for a reflection over the x axis?

The

**rule for a reflection over the x**–**axis**is (**x**,y)→(**x**,−y) .## How do you tell if a function is reflected over the y-axis?

**Reflection**across the

**y**–

**axis**:

**y**= f ( − x )

**y**= f(-x)

**y**=f(−x) Besides translations, another kind of transformation of

**function**is called

**reflection**.

**If**a

**reflection**is about the

**y**–

**axis**, then, the points on the right side of the

**y**–

**axis**gets to the right side of the

**y**–

**axis**, and vice versa.

## What does reflection across x =- 2 mean?

When you

**reflect**a point**across**the line y =**x**, the**x**-coordinate and the y-coordinate change places. or.**Reflecting over**any other line. Notice how each point of the original figure and its image are the same distance away from the line of**reflection**(**x**= –**2**in this example).## What happens when you reflect over Y X?

When

**you reflect**a point**across**the**y**-axis, the**y**-coordinate remains the same, but the**x**-coordinate is transformed into its opposite (its sign is changed). the**y**-axis is the point (-**x**,**y**).**Reflect over**the**y**=**x**: When**you reflect**a point**across**the line**y**=**x**, the**x**-coordinate and**y**-coordinate change places.## How do you reflect over X?

The rule for reflecting

**over**the**X**axis is to negate the value of the y-coordinate of each point, but leave the**x**-value the same. For example, when point P with coordinates (5,4) is reflecting**across**the**X**axis and mapped onto point P’, the coordinates of P’ are (5,-4).## What is the rule for Y X?

The line

**y**=**x**, when graphed on a graphing calculator, would appear as a straight line cutting through the origin with a slope of 1. For example: For triangle ABC with coordinate points A(3,3), B(2,1), and C(6,2), apply a reflection over the line**y**=**x**. By following the notation, we would swap the**x**-value and the**y**-value.## What is the rule of reflection?

A transformation that uses a line that acts as a mirror, with an original figure (preimage)

**reflected**in the line to create a new figure (image) is called a**reflection**.## How do you reflect a shape?

Reflecting a

**shape**simply means to**flip**it over a**mirror**line. Each point in the**shape**is moved to the other side of the**mirror**line but remains the same distance away from the line. The**reflected**image will now be facing in the opposite direction to the original object.## How do you find reflection?

Performing

**reflections** The line of **reflection** is usually given in the form y = m x + b y = mx + b y=mx+by, equals, m, x, plus, b. How do I draw the line of **reflection**? Each point in the starting figure is the same perpendicular distance from the line of **reflection** as its corresponding point in the image.

## How do you enlarge a shape?

To

**enlarge a shape**, a centre of enlargement is required. When a**shape**is enlarged from a centre of enlargement, the distances from the centre to each point are multiplied by the scale factor.## How do you find area?

## What is area formula?

Perimeter, Area, and Volume

Table 2. Area Formulas | ||
---|---|---|

Shape | Formula | Variables |

Square | A=s2 | s is the length of the side of the square. |

Rectangle | A=LW | L and W are the lengths of the rectangle’s sides (length and width). |

Triangle | A=12bh | b and h are the base and height |

## What is perimeter and area?

About Transcript.

**Perimeter**is the distance around the outside of a shape.**Area**measures the space inside a shape.## What is the perimeter formula?

The

**formula**for the**perimeter**of a rectangle is often written as P = 2l + 2w, where l is the length of the rectangle and w is the width of the rectangle. The area of a two-dimensional figure describes the amount of surface the shape covers.## How do you find the perimeter with the area?

The relationship between

**area**and**perimeter**of a square is that**perimeter**is 4 times the square root of the**area**. To**get**the**perimeter**from the**area**for a square, multiply the square root of the**area**times 4 .**Perimeter**is always measured in linear units, which is derived from the**area’s**square units.## What is a perimeter in math?

**Perimeter**is the distance around the edge of a shape.

## How do you find the perimeter given the area?

**Perimeter**of a Rectangle- Remember the formula for
**perimeter**and**area**of a rectangle. The**area**of a rectangle is a = length * width, while the**perimeter**is p = (2 * length) + (2 * width) - Substitute the known values into the
**area**formula. 36 = 4 * w. - Substitute values for length and width into the
**perimeter**formula.

## How do you find perimeter with area and width?

The

**perimeter**P of a rectangle is given by the formula, P=2l+2w , where l is the length and w is the**width**of the rectangle. The**area**A of a rectangle is given by the formula, A=lw , where l is the length and w is the**width**.