Question

Fill out the table using the function y=2^(-x)
x y
-2
-1
0
1
2

Answer 1

Plug in the following x values and see the output, which will be your y values.

Answer 2

@sammixboo I'm pretty sure that I got it, but I'm not 100%

Answer 3

So the x values are known, correct?

Answer 4

So, show us your y values then.

Answer 5

Oh wait. I see what they were telling me now. I've got it.

Answer 6

=)

Answer 7

So far I've got my y values as
x y
-2 1/4
-1 1/2
0 1
Does that sound right? @sammixboo

Answer 8

-2 (wrong)
-1 (wrong)
0 (right)

For -2, just plug in -2 as x, so you would have y = 2^(--2) which is the same as 2^(2)

Answer 9

Same goes for -1. 2^(--1) = 2^(1)

Answer 10

Oh alright. Thank you.

Answer 11

No problem =)

Answer 12

After doing that I got:
x y
-2 -4
-1 -2
0 1
1 2
2 4
This is correct as my final answer, right?.-.
(I'm sorry if I'm being bothersome.) @sammixboo

Answer 13

Not quite. Only the (0, 1) is correct. Let's go through each one, one by one starting with -2

Answer 14

We know that -2 = x, so plug in -2 for x

y = 2^(--2)

We know that --2 = 2, so now we have

y = 2^(2)

2^2 is the same as 2*2, so what is 2*2?

Answer 15

4

Answer 16

Right, so if x = -2 then y = 4

So, for your first one it's just 4

Can you try the second one again?

Answer 17

It would be just 2 I think.

Answer 18

Right!
So now we have
x = -2 then y = 4
x = -1 then y = 2
x = 0 then y = 1

Now, can you do the next one again? (it will be a fraction/decimal)

Answer 19

see a pattern?