Question

The graph shows the production of cars per day at a factory during a certain period of time. What is the domain of this function during this period?

Graph of days versus cars. Points are plotted at the following coordinates: 0 comma 0, 1 comma 50, 2 comma 100, 3 comma 150, 4 comma 200, 5 comma 250, 6 comma 300, 7 comma 350, 8 comma 400, 9 comma 450.

The domain is all real numbers 0 through 9.

The domain is all integers 0 through 9.

The domain is all positive real numbers.

The domain is all positive integers.

Answer 1

Look at the points on the graph. What is the x coordinate of each point?

Answer 2

1,2,3,4,5,6...etc? I really don't know, I missed this lesson :/

Answer 3

0 as well

Answer 4

I was correct?

Answer 5

so the domain is the set of all of those x values put together

{0,1,2,3,4,5,6,7,8,9}

it is the set of allowed inputs

Answer 6

So

Answer 7

I think it's A or B.

Answer 8

saying something like ` The domain is all positive integers.` is false because x = 12 for instance is NOT part of the domain. It stops at x = 9

Answer 9

What is the difference between `real numbers` and `integers` ?

Answer 10

Integers are numbers that are both positive and negative

Answer 11

is something like 12.5 an integer ?

Answer 12

Yes?

Answer 13

no, 12.5 isn't a whole number

it has the fractional/decimal part 0.5

Answer 14

12 is but 12.5 is not

Answer 15

integers are whole numbers
real numbers are any decimal number, fractional number, etc you can think of

Answer 16

Negative and Positive?

Answer 17

integers can be either positive or negative, yes

but they are also whole numbers too

Answer 18

I think it's A.

Answer 19

is there a point with say x = 7.2 ?

7.2 is a real number between 0 and 9

Answer 20

No. At least I don't think so due to 7.2 is not a Whole Number.

Answer 21

the points given in the graph only have x coordinates that are whole numbers, ie integers

Answer 22

the domain is actually the set of 0 through 9 where every number in this set is a whole number or integer

Answer 23

x = 3 is allowed but x = 3.7562 is not allowed. There are gaps between the different numbers