Question

Which of these ordered pairs could not be a dilation of (8, -4)?

(2, -1)
(2, -2)
(16, -8)
(4, -2)

Answer 1

If it was a dilation, then it would mean that both the x and y values of the point would be multiplied/divided by the same factor.
For (2,-1), it would work if (8,-4) was divide by 4.
(16,-8) would work if (8,-4) was multiplied by 2.
(4, -2) works if you divide (8,-4) by 2.
(2,-2) is the only one that does not work, so it cannot be a dilation of (8, -4)

Answer 2

thx