Question

A triangle is to be dilated with the origin as the center of dilation and with a scale factor of 2. Which answer choice correctly maps this dilation algebraically?​

Answer 1

All the coordinates are changed to

(x, y) ⇒ (2x, 2y)

Explanation:

Given - A triangle is to be dilated with the origin as the center of dilation and with a scale factor of 2.

To find - Which answer choice correctly maps this dilation algebraically?​

Proof -

Let ABC is a triangle where A, B, C are the vertices of the triangle respectively.

Now,

Let the coordinates be (x, y)

If a triangle is to be dilated with the origin as the center of dilation and with a scale factor of a , then the coordinated be changes as

(x, y) ⇒ (ax, ay)

Here given , a = 2

So, all the coordinates are changed to

(x, y) ⇒ (2x, 2y)