Answer is C and E.
All of the other ones don't follow order of operations properly.
D.
Slope is rise over run and in this case it is -15/ 5 so when it is reduced you get -3 as your slope
An exponential decay function is:
f=ir^t, f=final amount, i=initial amount, r=common ratio, t=number of times ratio is applied...We can see the initial value is 17000 so all we really have to find is the common ratio, or "rate" as some call it :P If we look at the second point, when t=1 we can see:
14280=17000r
r=357/425
r=0.84
So in five years the SUV will be worth more than the car by:
17000(0.84^5)-12000(0.89^5)
$408.73 (to the nearest cent)
The x-intercept of CD=18/5,0
Point lies on CD=32,-71