Question

HELP!!

Answer 1

911.

Answer 2

when x intercpts y = 0

when y intercpts x = 0

Answer 3

Solve now.

Answer 4

huh

Answer 5

Do you know how to plot a point on an x-y graph?

Answer 6

yea

Answer 7

for equation y= 3x-1
if x=0, can you figure out y?

Answer 8

yea

Answer 9

y=?

Answer 10

is it -1 ?

Answer 11

ok
now if x=1, what is y?

Answer 12

2

Answer 13

you now have two x,y pairs
(0,-1) and (1,2)
plot both points
draw a line through them.

Answer 14

shouldn't there be more pairs

Answer 15

You can try other numbers, but they will all end up somewhere on the the line. That's why the equation is so useful

Answer 16

so how many pairs should there be...?

Answer 17

You need only 2. Any 2.

Answer 18

so just 2 pairs?

Answer 19

is there a reason why there's only two pairs? or can you have more pairs?

Answer 20

Yes, just 2 pair. You can add another, for example
(-1,-4), but you will see it is on the same line

Answer 21

ok so you need AT LEAST 2 ?

Answer 22

more than 2 doesn't hurt, but it is more work.

Answer 23

ok

Answer 24

Normally people say you need 2 points to define a line

Answer 25

but how do you do y=x on a graph?

Answer 26

How would you do it?

Answer 27

i dont know

Answer 28

Did you do the first equation y=3x-1 ?

Answer 29

yea

Answer 30

How?

Answer 31

hold on

Answer 32

is that right?? :D ?

Answer 33

looks good. if you extend the line down you will see it crosses (-1,-4).

Back to y=x
You need 2 points. Set x to a number, and find y (it isn't hard for this one!). Do it for 2 different x numbers to get 2 pairs

Answer 34

\(＾∇＾)/

Answer 35

ok

Answer 36

so i could say y=2 and x would be 2 too?

Answer 37

yes. You start by saying x=2
Now what is y? y=x, so y=2
so my pair (x,y) is (2,2)

Answer 38

that one was easy

Answer 39

thanks for your help phi
☆☆☆☆☆
five star rating !!

Answer 40

It's easy after you know it. Not easy if you don't.

Answer 41

yepp