Question

What is a rule for the function (0, 1), (1, 0.5), (2, 0.25), (3, 0.125), (4, 0.625)?

Answer 1

good question. What level of math is this btw?

Answer 2

it seems to be an exponential function

Answer 3

8th grade Algebra honors

Answer 4

\[f(x) = 2^{-x}\]

Answer 5

okay

Answer 6

how did you get that answer anyway. just not getting it tonight.

Answer 7

Notice that, as x increases, y steadily shrinks.

Answer 8

You can visualize on wolfram alpha or plotting it yourself :) http://www.wolframalpha.com/input/?i=2+%5E+-x