Question

Given an exponential function for compounding interest, A(x) = P(.82)^x, what is the rate of change?

A. –18%
B. –8%
C. 0.82%
D. 82%

Answer 1

@welshfella 82%?

Answer 2

No - i think as the principal is decreasing Rate of change = 100-82 = -18%
Not absolutely sure though

Answer 3

@sdfgsdfgs It's -18?

Answer 4

yes you'd better check

Answer 5

\[a(x)=p*(1+r)^n\]

Answer 6

the prob is not clear: "rate of change" is not uniform for an exponential function...
http://www.regentsprep.org/regents/math/algebra/AE7/ExpDecayL.htm

if it is asking for "growth rate", then @welshfella is right on -18%.

Answer 7

And if it's not asking for "growth rate" then would the answer be different?

Answer 8

then there be no ans :P

Answer 9

Okay. Thanks!

Answer 10

welcome