Which of the following statements is true about an image after a dilation? Select all that apply.
A.

The image is the same shape as the preimage.
B.

The image is the same size as the preimage.
C.

The image has the same angle measures as the preimage.
D.

The image has the same orientation as the preimage.
E.

The image is congruent to the preimage.

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).