Question

What is the image of (2,1) after a dilation by a scale factor of 4 centered at the origin?

Answer 1

(8,4)

Explanation:

{Dilation: multiply each coordinate}

(x,y)→(4x,4y)

Dilations multiply by scale factor

(2,1)→(4⋅2,4⋅1)=(8,4)