Question

Solve the system by graphing.

( I will attach a picture ) *

Answer 1

@andreascott, where is your graphing calc?

Answer 2

I don't have one :(

Answer 3

just solve them

-2x = 2y -4
.
.
.
y = -x +2

2x-y= -5
.
.
y = 2x+5

now plug in 0 for the equations and you will get it

Answer 4

plug in 0 for x ?

Answer 5

She needs to know which graphs are correct.

Answer 6

Each set of graphs have the same solution point so solving the system won't help much.

Answer 7

At best, you would only be able to narrow it down to two choices.

Answer 8

im wrong

just add the equations

-2x - 2y = -4
2x - y = -5
----------------
-3y = -9
y = 3

no solve x

Answer 9

However, @andreascott, if you had a graphing calc, you would easily be able to graph both equations and figure out which is correct.

Answer 10

now*

Answer 11

lol

Answer 12

So , how am I supposed to figure it out. lol ?

Answer 13

i gave you y
plug it in one of the equations and solve for x

Answer 14

Which equation?

Answer 15

y = 3

lets say i want the 1st equation (-2x = 2y -4)

-2x = 2*(3) -4
-2x = 6- 4
-2x = 2
x = -1

you get the set (-1,3)

Answer 16

Yes , I get that . I just don't know how to graph it or watever. lol

Answer 17

But, I know its the 1st one .

Answer 18

you got the graphs its a1

Answer 19

Thank you . .

Answer 20

to check

plug 0 for x
y = -x +2
y = -0+2 = 2
(0,2)


y = 2x+5
y = 2*0 +5 = 5
(0,5)

Answer 21

its better for you to try these problems and post how far you got so we can help you understand it