(Answer ASAP) The image of a triangle after it has been dilated with a center of dilation at the origin has vertices at A' (12, -6), B' (-24,-12), and C'. If the pre-image of B', point B, has coordinates of (-18, -9) and the pre-image of C', point C, has coordinates of (-13.5, 18), which statements are true? Check all that apply. -The coordinates of C' are (27, 18).
-The coordinates of C' are (-18, 24).
-The scale factor is 1 1/3.
-The scale factor is 1 1/5.
-The coordinates of A are (16, -8).
-The coordinates of A are (9, -4.5).

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

k

step-by-step explanation:

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