Question

Which set is a function?


A)
{(0,3), (3,0), (0,4), (4,0)}


B)
{(0,2), (2,0), (4,6), (6,4)}


C)
{(2,6), (3,6), (4,6), (2,0)}


D)
{(6,2), (2,0), (4,6), (6,4)}

Answer 1

Does it mean linear function?

Answer 2

i think so

Answer 3

One sec.

Answer 4

kk

Answer 5

For a function to be linear, no points can cross each other.

Answer 6

Such as, no two x points can cross. Do you know domain and range?

Answer 7

ahh ok i know that part

Answer 8

A)
{(0,3), (3,0), (0,4), (4,0)} Domain = x Range = y
Domain : ( 0, 3, 0, 4) Range : (3, 0, 4, 0)
0 crosses twice for domain, so no.


B)
{(0,2), (2,0), (4,6), (6,4)}
D= (0, 2, 4,6) R=(2,0,6,4) Points have their own pairs.


C)
{(2,6), (3,6), (4,6), (2,0)}
D= (2,3,4,2) R = (6,6,6,0)
Dont think so.


D)
{(6,2), (2,0), (4,6), (6,4)}
D=(6,2,4,6) R=(2,0,6,4) Nope.

Answer 9

B is your answer.

Answer 10

thx so much!!!!!!

Answer 11

Welcome.

Answer 12

can you help me with another question plz?

Answer 13

Yes

Answer 14

ok thank you
Which inequality represents the graph?


A)
y < x - 2


B)
y > x - 2


C)
y ≤ x - 2


D)
y ≥ x - 2

Answer 15

I need a graph. (-:

Answer 16

ohhh yea duh stuipd me:)

Answer 17

sorry

Answer 18

That's okay! Okay. For graphing inequalities remember the inequality that is greater/less than equal to, will have a solid line. A graph that is just greater than or less than will have a dashed line. So, which ones can you eliminate from that?

Answer 19

i can eliminate D.

Answer 20

and C.

Answer 21

Not exactly. It has a line under the inequality telling us that the line will be solid, and in this graph your line is solid. D is a possible answer choice.

Answer 22

C is also a possible answer choice.

Answer 23

Unless you meant those were possible answers. Then you are right.

Answer 24

ok i was skepital of those two :/

Answer 25

so c and d are the possible choices then

Answer 26

That's okay. Yes, they are, because the line is solid on the graph. If it was referring to these signs -
<, >
the line would be dashed.

Answer 27

i think its D but i could be wrong

Answer 28

The best way to see if it is either C or D is to test a point in the shaded region to see which one it favors.

Answer 29

oh ok then its d then

Answer 30

Lets pick (1,1) from the shaded region, thats simple enough.

Answer 31

ok

Answer 32

C)
y ≤ x - 2
1 </ 1-2
1less than or equal to -1
Well 1 is not less than -1. Lets see what D says.

D)
y ≥ x - 2
1 greater than or equal to 1-2
1 is greater than -1.
This is true.
Good job getting the answer!

Answer 33

yay!! so its d.?

Answer 34

Yup.

Answer 35

yay thx alot for explaining the answer!!

Answer 36

You're welcome, they are tricky at first but get easier with time and practice.

Answer 37

thats very true

Answer 38

If you need any more help, I am here to help.

Answer 39

ok:)