The graph shows the value of a car at different years after joanna purchased it.

which is the best estimate for the average rate of change between year 9 and year 14?
a: –$130/year
b: –$250/year
c: –$75/year
d: –$325/year

if you need , reply with more info. u.

answer4 to the second power is 16

and 4 to the third power is 64,

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)