A line segment with endpoints Q negative nine comma thirty-six and R forty five comma eighteen is dilated with the origin as the center of dilation. The resulting endpoints are Q prime negative one comma four and R prime five comma two. What is the scale factor?

Question

anonymous · Answer

one-ninth
		
9
		
3
		
one-third

apoorvk · Answer

find out the ratio of distances QR and Q'R'. that will be the scale factor

anonymous · Answer

how do i do that?

apoorvk · Answer

know the distance formula?

anonymous · Answer

nope

apoorvk · Answer

for two points A(x,y) and B(x',y') distance AB between them is:
$$AB = \sqrt{(x-x')^2 + (y-y')^2}$$

Use this.

anonymous · Answer

can you please give me the answer?? im running out of time and if i do i will fail my course

apoorvk · Answer

I am sorry, but we do not just give away the answers - I explained it to you - it's pretty easy just plug in the values.

anonymous · Answer

is it 9?

apoorvk · Answer

If you are trying to guess randomly, then yeah '9'.

apoorvk · Answer

- or maybe not

anonymous · Answer

no i did not guess randomly i did some calculation , is 9 correct

naga447 · Answer

T_T apoorvk is mean...