Question

A box of pencils costs $10.The total cost (c) as a function of the number of boxes (b) is expressed as c = f(b) = 10b. What is the domain of this function?

A} all positive integers and zero
B} all real numbers
C} all real numbers except 0
D} all positive real numbers except 10

Answer 1

Do we have answer choices?

Answer 2

There we go, haha

Answer 3

@KalinaCriss666 Do you know what domain is?

Answer 4

Nope, I completely forgot

Answer 5

In a classic slope equation:

\[y = mx + b\]
\[f(x) = mx + b\]

The domain essentially represents all of the possible x values.

So in \[c = f(b) = 10b\] The domain represents all of the possible values for b.

Answer 6

OMFL THANKS SO MUCH!!!

Answer 7

You got it?

Answer 8

Yes!!

Answer 9

What answer did you get?

Answer 10

@KalinaCriss666

Answer 11

Eh, sorry, gimme a minute

Answer 12

I missed four questions, so I'm wondering which one I actually got right XD

Answer 13

Well the answer to this one was A, lol

Answer 14

Well f, I chose D X'D

Answer 15

D:

Why

Answer 16

My brain is f'ed up today, my dude

Answer 17

Think of it this way. All real numbers means both negative and positive numbers. Can there ever be -5 boxes of pencils?

Answer 18

Remember what b stands for, # of boxes

Answer 19

There can however, be 0 boxes and 3 boxes. Thus why it is positive integers and zero. Also, integers basically mean it's not a fraction. So no 1/2 boxes or 3.5 boxes.