Question

The figure is the graph of an exponential growth function f(x) = Pax. Find the rule of the function f by finding a. (Hint: First find P by finding f(0). Then find a by finding f(2).)

Answer 1

http://www.webassign.net/hprecalc5/hucp05.05.02.64m116.jpg

Answer 2

Answers:
f(x)=10(4^x)
f(x)=5(6^x)
f(x)=10(5^x)
f(x)=5(4^x)
f(x)=5(5^x)

Answer 3

in the question it should be pa^x

Answer 4

first makling f(0) as suggested, you will find f(0)= 5 * sometthing^x.
so p=5.

using the points:

(2,80)

80 = 5 a^x , a^x =16 by exclusion a =a

so we have f(x)=5(4^x)

Answer 5

That is correct, but could you explain it in a more simple way so I can understand it better?

Answer 6

im on phone .. a minute

Answer 7

thats fine. i just want to get it down in my head.

Answer 8

f(0)= p * a^0 = 5, p=5

using the points (2,80) and replacing on the formula

f(2) = 80

5* a^2 = 80

a^2 =16

a= 4

did you get??

Answer 9

where did you get 16 from?

Answer 10

80/5

Answer 11

what about a^2?