Which pair of numbers is relatively prime?

a) 20 and 76
b) 25 and 65
c) 46 and 87
d) 63 and 117

answer: this is not a question

step-by-step explanation: this is a answer

i am not sure :

step-by-step explanation:

look at photo

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)