Question

Which ordered pairs are solutions to the equation?

y = x – 4

A.
(10, 4) and (5, 1)

B.
(10, 6) and (1, 5)

C.
(10, 6) and (5, 1)

D.
(10, 5) and (5, 1)

Answer 1

@iambatman

Answer 2

Ordered pairs are in (x,y) order. So if you plug in 10 for x in the equation, and 4 for y, then you can see if the equation is correct.

Answer 3

So once you plug those in, the equation should look like this. \[4=10-4\]

Answer 4

But that's not true so A. isn't the answer. \[4\neq10-4\]

Answer 5

You can do that for all of the options until you get one that works. Does that make sense, or should I lead you through it some more?

Answer 6

yes please because I really dont understand this

Answer 7

Ok. So, the ordered pairs are in the order x,y. So x comes first and then comes y. So if you have an ordered pair of (7,14), x=7 and 14=y. Right?

Answer 8

yes

Answer 9

its not D

Answer 10

@AlexandervonHumboldt2 @AMYCARTER

Answer 11

Okay let's try B now @verita1959! We're going to substitute 10 for x and 6 for y!
\[y=x-4\] ← this becomes this ↓
\[6=10-4\]

Now tell me if this is a true statement!

Answer 12

I dont think it is true but I am not sure I am so confused

Answer 13

Is \[10-4\] equal to 6?

Answer 14

yes

Answer 15

Ignore what I just posted lol the equation becomes this ↓
\[5=1-4\]
Is this a true statement @verita1959?

Answer 16

yes@AMYCARTER

Answer 17

@AMYCARTER

Answer 18

Okayy so \[1-4\] is equal to 5? I don't really agree @verita1959

Answer 19

Do we agree that B is not a solution @verita1959? Are you still there?

Answer 20

yes sorry

Answer 21

so it has to be C?

Answer 22

It's fine! Now let's move on to C because I have a good feeling about this one!
Substitute x,y for 10,6 ↓ We did this earlier remember?
\[6=10-4\]
We know THAT is true! Now substitute x,y for 5,1
\[1=5-4\]

Is C ur answer?

Answer 23

yes pretty much

Answer 24

Great job @verita1959! I hope I helped you today :)

Answer 25

Thank you so much for your help

Answer 26

np @verita1959 :)

Answer 27

Great explanation @AMYCARTER and thanks for taking over, too. I had to go spur of the moment.