Question

Making sure if I got the domain and range right - Identify the domain and range of the function: a = f(b) = 10b. - My answer in the comments.

Answer 1

Domain: \[a \ge 0\] Range: \[10 \le b \ge 0\]

Answer 2

Domain: Any number greater than or equal to zero.
Range: Any number great than or equal to 10 or 0

Answer 3

first off what you said does not make sense

the way you wrote the function a=f(b) =10b
impplies a is the output and b is the input, so domain would be in terms of b and range in terms of a

your function is f(x) = 10x

is there any reason we cant put in a negative number?

Answer 4

The segment title says functions with rational numbers.

Answer 5

I am not sure what you mean...

Answer 6

The problem is from a problem book I have. It's divided into segments ie chapters. the chapter title says "Functions with Rational numbers."

Answer 7

Oh and I forgot, it does say to exclude negative numbers on the chapter I'm on.

Answer 8

a = 10b
f(b) = 10b

Answer 9

@Michele_Laino Sorry, I need to expertise again

Answer 10

ok! where is your question?

Answer 11

Making sure if I got the domain and range right - Identify the domain and range of the function: a = f(b) = 10b.

Answer 12

is your function a real-value function?

Answer 13

\[a \ge 0\]\[10 \le b \ge0\]

Answer 14

Domain: Any number greater than or equal to zero.
Range: Any number great than or equal to 10 or 0

Answer 15

Negative numbers are excluded.

Answer 16

if
\[0 \le b \le10\]
then we can write:
\[0 \le 10b \le 100\]

Answer 17

b has to be 0 or 10 or greater than 10

Answer 18

so:
\[0\le a=f(b) \le 100\]

Answer 19

Range: a is great than 0, equal to or greater than 10?

Answer 20

if b is Greater or equal to zero the domain of your function is all positive real numbers,
included zero,
so the range of your function is the same set, namely all positive real numbers included zero
graph of your function is:

Answer 21

Thanks, for the 3rd time :) Damn functions T.T

Answer 22

thanks!