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)
c. the third graph
i'm 75% sure the answer is 1,1 to both lines.
have a great day
x = 12
y = 15