# Transformations

### 2) The equation of the line of symmetry

To describe a reflection on a grid, the equation of the mirror line is needed.

Reflect the shape in the line $x=-1$.

The line $x=-1$ is a vertical line which passes through -1 on the x-axis.

##### Question 1

Describe the transformation of the shape ABC.

Answer: The line is a horizontal line which passes through 1 on the x-axis. The shape has been reflected in the line $y=1$.

##### Question 2

Reflect the shape in the line $y=x$.

Answer: The equation of a straight line graph has the form of $y=mx+c$, where m is the gradient and c is where the line crosses the y-axis.

The line $y=x$ has a gradient of 1 and crosses the y-axis at (0,0).

##### Question 3

Describe the transformation of the shape ABC.

The mirror line has a gradient of -1 and crosses the y-axis at (0,0). The shape has been reflected in the line $y=-x$.

< Previous | 1 | 2 | 3 | 4 | 5 | 6 | 7 | Next >