Question

graph the equation by plotting three points -x-y=1

Answer 1

Rearrange to isolate y. Proceed to plotting.

Answer 2

how do I do that

Answer 3

like this y=x-1

Answer 4

Not quite. When you moved the x over to the other side, what you should have was
-y= 1+x
To isolate y, you must multiply every term in the equation (term being every chunk separated by + or - from each other) by -1

Answer 5

multiply by what number? -y

Answer 6

You must realize that multiplying everything by -y would get you a y in every term of the equation, which is the opposite of what you want to be doing. The goal here is to make y appear only once and without anything else by its side.
You should also realize that -y is another way of writing (-1)y.

Answer 7

What you were doing initially was very close to what you were supposed to do, but you missed the division by -1 on the x term when you isolated the y.

Answer 8

so dived all terms by -1

Answer 9

Yes. I said multiply before only because it was -1 and would have been no different from dividing by -1. Sorry if what I said was confusing.

Answer 10

its fine so y=-1+x

Answer 11

you start with
-x-y=1

add +x to both sides
-y = x + 1
divide all terms by -1
y = -x -1

Answer 12

Still no. 1 and x are two different terms, you must divide both by -1, not just the 1.

Answer 13

now pick small values for x, and find the corresponding y

Answer 14

0,1,2 for x

Answer 15

and y is ?

Answer 16

(0,-2) (1,-2) (2,-3)

Answer 17

typo ?

Answer 18

is that wrong

Answer 19

y= -x - 1

what is y when x=0 ?

Answer 20

-1

Answer 21

yes.

Answer 22

ok (0,-1) (1,-2) (2,-3)

Answer 23

is that right

Answer 24

yes. you can always check by using the original equation
-x-y=1

to test point (2,-3) replace x with 2 and y with -3 :
-2 - (-3) = ? 1
-2 +3 =? 1
1 = ? 1
yes.

the other points also work

Answer 25

thanks would you mind helping me with a few more

Answer 26

one more