Question

HELP PLEASE I FORGOT WHAT TO DO !?

Answer 1

@phi

Answer 2

do you know how to replace x with 0 and y with 1 in an equation ?
for example, for equation
x-y=1

do you know how to replace x with 0 and y with 1 ?

Answer 3

0-1=1 ?

Answer 4

exactly
now simplify 0-1 on the left side

Answer 5

hopefully you don't need a calculator. 0 - 1 is what ?

Answer 6

1=1 ?

Answer 7

no. 0-1 is -1
we get
-1 = 1
which is not true. That means that equation is not the one we want

we want to find an equation where (0,1) works.

we have to test each of the choices. we just did the first choice, and it is not the answer

Answer 8

lol ok so the eqaution would be x-y=1 ? :D

Answer 9

no, not x-y=1
because (0,1) does not work. in other words the point (0,1) is not "on the line"
if we plotted x-y=1 we get a line, and it does *not* go through (0,1)

Answer 10

let's try
2x + 2y = 4

replace with 0 and y with 1

Answer 11

I got 0+2=4

Answer 12

yes, and 0+2 simplifies to 2
2=4
not our guy!

try the next equation
x+y= 0

Answer 13

0+1=0

Answer 14

is the true ?

Answer 15

nope

Answer 16

so we have one more to try
x+2y= 2

Answer 17

ans for the last one i got 2=2 so its true

Answer 18

and*

Answer 19

yes.

they say "an equation in the system...."
that is a fancy way to say: we have two lines (equations)
that meet at the the point (0,1) (a solution is a point that makes both equations true)

and they wanted us to find another line that goes through the point (0,1)

Answer 20

thanks :D

Answer 21

btw, their line is not the only one that would work
but it's the only one on their list of choices that works.