Is (3, 13) a solution of the equation y = 4x? (1 point)

Explain? :/

Question

Is (3, 13) a solution of the equation y = 4x?  (1 point)

Explain? :/

jim_thompson5910 · Answer

any point is (x,y)

so (3, 13)  means x = 3 and y = 13

jim_thompson5910 · Answer

from here, plug in x = 3 and y = 13

y = 4x

13 = 4*3

Keep going...

anonymous · Answer

How do you know that y=13 and x = 3?
Sorry i'm bad at math

jim_thompson5910 · Answer

because the point is (3,13)

jim_thompson5910 · Answer

(x, y)  = (3,13)

so 

x = 3
y = 13

anonymous · Answer

its y,x though.?

anonymous · Answer

y = 4x

jim_thompson5910 · Answer

no, any point is of the form (x,y)

jim_thompson5910 · Answer

x comes first

anonymous · Answer

Oh Okay, What Do We Do After That?

jim_thompson5910 · Answer

y = 4x

13 = 4*3

What's the next step

anonymous · Answer

Uhm.. well it will end up being 13 = 12 so divide?

jim_thompson5910 · Answer

good

does 13 equal 12 ?

anonymous · Answer

Its No.. Right!? :D

jim_thompson5910 · Answer

that's correct, 

since 13 = 12 is FALSE, this means that (3,13) is NOT a solution

jim_thompson5910 · Answer

it's only a solution if x and y make the equation true

anonymous · Answer

So in order for it to be true it will have to be 13 = 13?

jim_thompson5910 · Answer

yes or 

SOME NUMBER = SAME NUMBER

anonymous · Answer

it feels so good to finally understand one equation of algebra,
Do you have skype? aha

jim_thompson5910 · Answer

ex:

(3,12) is a solution

y = 4x

12 = 4*3

12 = 12

and so is (8,32)

y = 4x

32 = 4*8

32 = 32

etc etc

There are infinitely many of these ordered pairs

anonymous · Answer

I got you

jim_thompson5910 · Answer

that's great

anonymous · Answer

can you keep helping me? c; lol

jim_thompson5910 · Answer

sure

anonymous · Answer

Which ordered pair is a solution of the equation y = 3x?  (1 point)

So would (y) = 1 since its not given a number?

anonymous · Answer

here are the answers

(–2, –9)
(–8, –18)
(–8, –3)
(–10, –30)

jim_thompson5910 · Answer

Do the same thing, but now we're talking about a different equation

y = 3x

-9 = 3(-2) .... Plug in x = -2 , y = -9

-9 = -6

which is FALSE...so (-2, -9) is NOT a solution

anonymous · Answer

This is hard.
I'm confused.

anonymous · Answer

So you keep going through the answers to see which one is the same?

jim_thompson5910 · Answer

yes

jim_thompson5910 · Answer

you need to test them all

anonymous · Answer

Plug in x = -2 , y = -9 
-9 = -6 
How did you get -6?

jim_thompson5910 · Answer

3 times -2 is -6

jim_thompson5910 · Answer

y = 3x

-9 = 3 times -2

-9 = -6

anonymous · Answer

Oh I Got You!

jim_thompson5910 · Answer

ok great