Question

solve each system by graphing
y = x^2 + 1
y = x + 1
can someone help me with these??

Answer 1

@jim_thompson5910 can you please help me with graphing?

Answer 2

do you know how to graph each equation?

Answer 3

no i dont actually

Answer 4

what kind of calculator do you have?

Answer 5

just the one on my computer i guess

Answer 6

ok, I recommend downloading and installing geogebra (it's free)

Answer 7

that's the main graphing program I use

Answer 8

let me know once you have that set up

Answer 9

The solution to the system of linear equations will be where they intersect (that is, where they share the same x and y value).

Answer 10

If you're using a Mac, use Grapher. It's simple. See attached.

Answer 11

To open Grapher, hit Command-Space, and type "Grapher," then press Enter. Select 2D Graph. Then, Go to the Equation menu and insert your equations.

Answer 12

comand space?

Answer 13

The little command button by the space bar. It looks like a square with loops at the corners. Commad-space opens the search function on your mac; press them together and the top right search box should open. Type Grapher in it.

Answer 14

See attached for the search box (spotlight)

Answer 15

Alternatively, you could pinch three fingers and your thumb together on your trackpad to open your applications, go to utilities, and select grapher:

see attached

Answer 16

but it didnt show up? @digitallogic

Answer 17

What do you mean?

Answer 18

its probably blocked since this is a school computer

Answer 19

Oh.

Answer 20

is there any other way do this have this on apps?

Answer 21

like on a phone?

Answer 22

What kind of phone do you have?

Answer 23

android galaxy s4

Answer 24

and an iphone 4

Answer 25

https://play.google.com/store/apps/details?id=us.mathlab.android

Answer 26

Looks like it has good reviews.

Answer 27

im sorry but i cant open it, whats it called?

Answer 28

https://itunes.apple.com/us/app/free-graphing-calculator/id378009553?mt=8

Answer 29

Oh lol. This android one was called Graphing Calculator by Mathlab

Answer 30

okay thanks so much!

Answer 31

The apple one is called Free Graphinc Calculator by William Jockusch

Answer 32

Graphing*

Answer 33

Alright good luck :)

Answer 34

Here:

Answer 35

So another way to solve this system without graphing is to just set them equal to each other and solve for x. You are essentially finding what values of x make both equations equal to each other.

Answer 36

oh thanks i have to solve them with graphing though, but when i typed in
y=x^2+1 and y=x+1 they just showed me a line going straight though the middle diagonally

Answer 37

Look at the picture I attached two posts up.

Answer 38

yeah i saw it but i wanted to try and match it to see if i was doing it correct but thanks

Answer 39

that's a little off but it should look that. when x=0 and x=1 the lines intersect

Answer 40

so your points are (0, y) and (1,y_2)

Answer 41

but i thought it would look like this? http://assets.openstudy.com/updates/attachments/537437f2e4b0d68cb081866f-digitallogic-1400210532080-screenshot20140515at22.12.14.png

Answer 42

you found that from the graph; now plug in 0 into the easy equation (x+1) and you get y=1, plug in 1 and you get y=2

Answer 43

Yeah that picture from Grapher on my computer is just squished a little. It's the same graph, just a different scale.

Answer 44

I could set the scale to math the graph from wolfram and it would be exactly the same; both are correct

Answer 45

so your answers are (0,1) and (1,2)

Answer 46

those are the points of intersection; the solutions to the system are x=0, x=1

Answer 47

which you found from the graph

Answer 48

where are you? europe?

Answer 49

it's 22:42 here lol; you're in school, i am in a coffee shop

Answer 50

no im in america haha no im at home but its easier to take online classes

Answer 51

oh lol

Answer 52

its 11;41 pm here

Answer 53

22;42?

Answer 54

i said it that way cause i assumed you are european; they use 24 hour time, mostly

Answer 55

22;42 = 10:42PM

Answer 56

10PM is th 22nd hour in the day; 24 hours in a day, midnight is 00:00, 11:59 pm is 23:59

Answer 57

i wish i was in europe lol

Answer 58

no AM/PM nonsense lol

Answer 59

just the same, they use actual mass for measuring "weight"

Answer 60

ive lived my whole life using am and pm and yeah i knew about that haha are you american also?

Answer 61

yep :)

Answer 62

i studied abroad in europe for a year tho

Answer 63

i wish i could go there and study

Answer 64

someday! do well in school and you will have the opportunity to study abroad in college for sure

Answer 65

even if it costs something, but it is possible

Answer 66

im always leaving to the middle east every year so money isnt a big problem im just not that smart in school tbh

Answer 67

oh cool :)

Answer 68

oh yeah you are, it just takes practice and effort

Answer 69

a hard-working b student will be more successful than a lazy genius

Answer 70

no matter what

Answer 71

and a hard-working b student will become an a student through practice

Answer 72

i wish i was a b student right now i have a c in algebra because i cant get pass this lesson of graphing lol

Answer 73

lol well hey, i made a c in algebra back in the day