Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7) .

Use the Polygon tool to graph the quadrilateral by connecting all its vertices.

Guest Jan 16, 2018

#1**+2 **

Here's the "formula" to compute each new point

New Point = [ Given Point - Dilation Center ] * Scale Factor + Dilation Center

Note that

(a, b ) - (c, d) = ( a - c, b - d)

(a, b) + ( c, d) = ( a + c, b + d)

(a, b) * N = ( N*a, N*b )

So....the new point associated with ( 3, - 3) is

[ (3, - 3) - (2, -7) ] * 3 + (2, -7) =

[ ( 1, 4 ) ] *3 + (2, - 7) =

(3, 12 ) + (2, - 7) =

(5, 5 )

You should be able to compute the other three

CPhill Jan 16, 2018