Question

What is the image of (-1,9) after a dilation by a scale factor of 2 centered at the origin?

Answer 1

`A' = (-2,18)`

Explanation:

Given

`A = (-1,9)`

`k = 2`

Required

The image

Let the point be called A, such that the image is A'.

A' is calculated as:

`A' = k * A`

This gives:

`A' = 2 * (-1,9)`

`A' = (-2,18)`