Question

Graphing Linear Equations in 2 Variables

Answer 1

@JustSaiyan

Answer 2

@Elsa213

Answer 3

@Jason64

Answer 4

Let's try plugging in x = 4 into the given equation

what would you get for \(y\)?

Answer 5

oh my bad, I mean to say plug in x = 2
that would be easier

Answer 6

actually angle i have no idea how to do this at all so yea my teacher just gave it to me

Answer 7

ok, no problem

here's an easy example of what I mean by "plug in"
say we have the equation \(y = 2x\)
this is basically "I double whatever you give me"
so if you give me \(2\) (for x), I give you \(4\) (as y)

essentially, when you give me "2",
plugging in looks like \(y = 2(2) = 4\)

Answer 8

oh it make a little more sense but i am still confussed

Answer 9

So

when we plug in \(x = 2\)
into the given equation \(-4y = x -18\)

we stick the \(2\) in like this:
\(-4y = (2) - 18\)

and we can "solve" for y like this
\(-4y = -16\)
(then divide both sides by negative 4)
and get
\(y = 4\)

Answer 10

aww okay

Answer 11

so one of the points you can graph is:
when x=2 you have y=4

you may also see this in class as (x, y) = (2, 4)

do you know how to graph coordinates? :)

Answer 12

kind of

Answer 13

well i got the answer thank you very much

Answer 14

no problem, I'm glad I could help

if you need any more explaining, feel free to ask :)

Answer 15

okay thank you