Answer:
I hope that it is a plus in the equation
y = 7500x + 125000
a) for the current value the answer would be
y = 7500 x 0 + 125000 as we start from this year so it is basically 0 years now
so the price would be only 125000 $
b) y = 7500 x 2 +125000 for 2 years as we change the x value
which gives y = 15000 + 1250000 = 140000 $
c)after 7 years would be
y = 7500 x 7 + 125000
y = 177500 $
d) the changing rate will find the common difference between them
so the current year price is 125000$,
the first year would be = 132500$ and so on
d = 132500 - 125000
d = 7500 Hence thats the rate of changing.