Ialready did the unit rate i just need figuring this out how to do the rate

A. Rate=420/7

B. Rate=360/30

C. Rate=40/16

D. Rate= 7.95/5

I hope this is right!!!        

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.