Question

Solve each system of equations by graphing.

y = 2x + 1
y = -x + 1

Answer 1

y = 2x + 1
y = -x + 1

---------------------

2x + 1 = -x + 1

solve for x

Answer 2

I don't really know how to do that.

Answer 3

Could you help me? I'm sorry :(

Answer 4

How did you do that all? I don't get it :(

Answer 5

And how do I graph it?

Answer 6

@some_someone

Answer 7

Graph: y = 2x + 1
&
Graph: y = -x + 1

Answer 8

graph the two lines on a graph and then look for the point of intersection

Answer 9

I don't get how you graph them?! :(

Answer 10

You have to talk me through this, we learned it today and I was too scared to ask for help

Answer 11

the line equation is in the form y=mx+b where m is the slope of the line, and b is the y-intercept

Answer 12

Yes I get that part

Answer 13

so for y = 2x + 1 identify the slope and the y-intercept

Answer 14

remember:
y = mx + b

--where: m is the slope; & b is the y-intercept

Answer 15

I did what the someone guy said and it was (0,1) but I think I need another one

Answer 16

?

Answer 17

graph y = 2x + 1

Answer 18

How do you graph that?

Answer 19

Could you do the graph for me as an example? I'm lost

Answer 20

slope = rise / run = 2/1
b or y-intercept = 1

Answer 21

What do I do with the (0,1) ?

Answer 22

thats the answer but the question asking you get that by graphin

Answer 23

Ohhhhh

Answer 24

yeah (0,1) is the solution.

Answer 25

Wait so I go up 2 and then to the right 1?

Answer 26

yes

Answer 27

what about the other 1

Answer 28

slope is -1 so you go down 1 and right 1

Answer 29

I have to have 2 lines though

Answer 30

everything clear now?

Answer 31

I thoguht I was suppose to go up 2. On yours it says the point of intersection is 1

Answer 32

ya thats where the two lines intersect

Answer 33

could you use this and do it on here

Answer 34

@dav21

Answer 35

ok first im gonig to draw y = 2x + 1

Answer 36

first plot the y-intercept which is at point (0,1) then go up 2 and right 1 cause thats the slope

Answer 37

ok got that part

Answer 38

ok connect all the dots and make a straight line

Answer 39

ok got that part too. But I have to have another line and stuff. There has to be 2.

Answer 40

ya now graph y = -x + 1

Answer 41

I don't understand how you graph these unless you give me the points and tell me which way to go

Answer 42

y = -x + 1, first plot the y-intercept

Answer 43

the y-intercept is at 1

Answer 44

same as the first line

Answer 45

how many do I go to the right and up

Answer 46

y = (-1)x + 1, because our slope is negative we go down 1 and right 1

Answer 47

positive slope means go up and right, negative slope means go down and right

Answer 48

Thanks! Can you help me with a few moer?

Answer 49

@dav21

Answer 50

x + y = 4
x + y = 2

Answer 51

ok first lets get the two equations in y = mx + b form

Answer 52

ok.

I need help with that

Answer 53

x + y = 4, bring the x on the right side

Answer 54

ok now what

Answer 55

do the same for the other line as well

Answer 56

show me what you have so far

Answer 57

I have x + y = 4

Answer 58

x + y = 2

Answer 59

x + y = 4, if we subtract x from both sides of the equation what do we have

Answer 60

y = 4x?