Can anyone help me with these (homework)?

Question

For exercises 14 and 15, the rule (x,3/4y) is applied to a polygon.
14.Is the image similiar to the origanal polygon? Explain.
15.The given poin is on the origanal poly gon. Find the image of this point.
a.(6,8) B.(9,8) C.(3/2, 4/3)

Can whoever answers this explain it to me, too?

Answer 1

14. The image is not similar - it keeps the same horizontal dimensions (x), but is resized to by 25% shorter (y). To be similar, both x and y must undergo the same scaling (both would have to be reduced by 25%, for example).

15.) For all 3 of these, simply plug the point into the rule.
a.) (6,8)
x = 6, y = 8, so:
(6,8) -> (6 , (3/4)(8)) = (6, 6)
b.) (9,8) -> (9 , (3/4)(8)) = (9, 6)
c.) (3/2, 4/3) -> (3/2, (3/4)(4/3)) = (3/2, 1).