Question

Determine the domain and range for the following function.
f(x)= -2^(x-1)+3

Please help!

here are the answer choices
Domain: all real number number
Range: y < 0
Domain: x < 1
Range: all real numbers
Domain: all real number number
Range: y>3
Domain: x > 1
Range: all real numbers
Domain: all real number number
Range: y<3
Domain: all real number number
Range: y>0

Answer 1

Domain is all real numbers

Answer 2

what do you think the range is?

Answer 3

lets talk about it. when x = 1, y = 4, so that already eliminates y < 3 and y <0

Answer 4

okay. I'm think it is y>3

Answer 5

range is y>3
correct

Answer 6

wait!

Answer 7

awwwh that was easy! thank you so much

Answer 8

oh okay

Answer 9

what if x = 2?

Answer 10

then y = 1

Answer 11

so the range can't be y>3

Answer 12

dang it, okay then maybe it's y>0

Answer 13

or would it be x>1

Answer 14

the range is y>1, I believe

Answer 15

sorry

Answer 16

I have to go, I will answer this question later. double check the range with someone else!

Answer 17

Domain: all real number number
Range: y<3

Answer 18

That I believe is the answer. I found the range by testing various values of x and by graphing the function in my head. Ask more questions!