Question

Can anyone help me with PreCalc?
Write the equation of an exponential function given the points (1,48) and (2,24)?

Answer 1

hint : 48/2 = 24

Answer 2

So... in A(t) = A0*e^(-k*t)
1/2 =A?
I'm sorry, my teacher has taught me nothing this year, and expects us to know this.

Answer 3

@ganeshie8

Answer 4

forget about e

Answer 5

:)

Answer 6

simpler than that

Answer 7

since going from 1 to 2, is halving the value, the exponential funciton shud be of form :-

\(\large y = k \frac{1}{2^x}\)

Answer 8

Okay... so how would I find the equation given the points?

Answer 9

since y = 48, when x = 1,

k = 96

Answer 10

so the exponential equation wud be

\(\large y = 96 \times 2^{-x}\)

Answer 11

see if that makes some sense

Answer 12

Alright, I'll try to figure it out from there(: Thanks!

Answer 13

good :) u will have to see it for urself i guess