SOLUTION: Line r’ is the dilation of line r. Find the scale factor, k ,of the dilation if the origin is the center of the dilation. http://prntscr.com/r7iwkw a. k = 1.5 b. k = 4 c.

Question 1152987: Line r’ is the dilation of line r. Find the scale factor, k ,of the dilation if the origin is the center of the dilation.
http://prntscr.com/r7iwkw
a. k = 1.5
b. k = 4
c. k = 3
d. k = 0
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
When a figure is dilated, a segment (side) of the pre-image that does not pass through the center of dilation will be parallel to its image.
center of dilation:(,)
point on line is:(,)
point on line ’ is:(,)
so, (,)=(,)=(,)=>the scale factor is

answer:b.
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