Question

i need help. will give medal. question attached.

Answer 1

Have you tried eliminating the least likely answer or answers?

What happens if x=0 for some given week? Will this person be taking in money, losing money or neither?

Answer 2

losing money

Answer 3

Yes, and how much ?

Answer 4

$30

Answer 5

does that help you to select the correct answer?

Answer 6

Yes, so she is going to lose $30 if x=0, (or in other words, if she knocks on zero doors, or doesn't knock on any doors for a week)

Answer 7

@mathmale nope. i'm still a bit confused

Answer 8

\[E(x)=10x-30\]
x is the number of doors she knocks
E(x) is the dollars she makes (depending on the number of doors she knocks)

So,
you can say that
x E(x)
0 -30
1 -20
2 -10
3 0
4 10
5 20

Or, -30,-20,-10,0,10... as an arithmetic sequence.

Do you see what I am saying?
Now if she doesn't knock on any doors, or in other words, knows on zero doors, she is loosing how many dollars ?

Answer 9

"Expenses" and "lose money" go together in this particular problem. It's a fact of life that making money usually involves spending some money up front.

Note that this question asks you to interpret the meaning of the y-intercept of the graph of this function. If you start out with a function and let x=0, you end up sitting somewhere on the y-axis, right? And the y-axis represents how much this person earns in a week.

Try it yourself. The function is E(x)=10x-30. Let x=0. What is E(0)? This represents money. Will that amount of money be a gain or a loss? Why? Will that amount be income or expense?

I believe there are 2 possible answers that would be correct.

After reviewing this material, try again: which of the several possibilities be correct in this case?

Answer 10

Well, I would think that there is only one answer....

Answer 11

ok so now i'm pretty sure that D is one of the answers but it is a multiple answer question and i don't know what other answers are correct

Answer 12

@SolomonZelman oh ok i will try it thank you

Answer 13

@solomonzelman turns out the answers were A and D

Answer 14

Please note: the problem statement says, "Check ALL that apply." That implies that there could be more than one correct answer.

Answer 15

Well, you can exclude B C b/c none of them are true. (not even saying that it is not true that it is what the y-intercept does, so to speak, but saying that the statement(s) aren't true, because that is just not happening in this case.

A is also true I think, because if she isn't going to knock on the doors, then she will loose $30 tells us that A is true, it's hard to explain, but you get it....

Answer 16

So yeah, ... A and D (but to me, A is not as direct as D is )

Answer 17

In other words, if this person makes no effort to knock on doors, she still has those expenses of $30/week, which could be interpreted as a loss.

Answer 18

@SolomonZelman @mathmale okay thanks guys

Answer 19

Anytime !