PLEASE HELP ME MEDALS & FANS AWARDED.
A triangle with vertices at A(0, 0), B(0, 4), and C(6, 0) is dilated to yield a triangle with vertices at A′(0, 0), B′(0, 10), and C′(15, 0)-. The origin is the center of dilation. What is the scale factor of the dilation?

Question

PLEASE HELP ME MEDALS & FANS AWARDED.
A triangle with vertices at A(0, 0), B(0, 4), and C(6, 0) is dilated to yield a triangle with vertices at A′(0, 0), B′(0, 10), and C′(15, 0)-. The origin is the center of dilation. What is the scale factor of the dilation?

ladiesman217 · Answer

@E.ali HELP PLZ I DONT UNDERSTAND

anonymous · Answer

i guess 4 is shifted to 10 and 6 to 15

yttrium · Answer

You can easily find their dimension because the given are written in intercepts. And knowing that 4 was shifted to 10, we can now get the scale factor by diving them. 
Hence, 4/10 or 2/5
It is also proven if we used the (6,0) and (15,0)
6/15 = 2/5
Therefore, the scale factor is 2/5

anonymous · Answer

Look :
First find the size of lines :)
AC and AB and BC 
A' and B 'and C'
OK ?:)

ganeshie8 · Answer

btw, scale factor is 5/2 
cuz we always take ratio of image and preimage for scale factor. not the other direction :)

anonymous · Answer

The answer is 2.5