In the diagram, a = 50 and b= 80. a. c=40 and d=72 b. c=40 and d=75 c. c=45 and d=75 d. c=45 and d=72 For what values of c and d would the rectangles be similar?

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.