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

jigglypuff314 · Answer

compare a set of before and after points
so like  B (0, 4)    and    B' (0, 10)

we want to know, what times (0,4) gets (0,10)

so   something times 4 = 10
can you think what that something might be?

kandy · Answer

2 1/2 ?

jigglypuff314 · Answer

that's right!

so that would be your scale factor :)

you can check this by doing
does  2 1/2  times  6  equal 15?

kandy · Answer

YUP! thank you !!!

jigglypuff314 · Answer

I'm glad I could help :)
Welcome to OpenStudy by the way ^_^

kandy · Answer

Thanks!