Question

Write the equation of the line given by the following graph in standard form.
( LOOK AT PICTURE )

answer choices:
2x – y = –1

2x + y = –1

2x + y = 1

2x – y = 1

Answer 1

just look at the intercepts
which are (0,1) and (1/2,0)
plug those in for x and y and see which one fits

or you could write out the intercept slope and convert it into standard form

Answer 2

My first answer was 2x + y = –1

would i plug those into the original?
@completeidiot

Answer 3

I don't know if that answer was right or not

Answer 4

You could also just put each one in terms of y and graph them...a visual comparison is very easy.

Answer 5

(graph them on a calculator I mean..by hand is too slow...assuming you're allowed to use one).

Answer 6

I am, this is one of my study assignments. I just don't know what I am doing wrong...


was the answer i picked above not correct? @Shane_B

Answer 7

No...if you graph the answer you posted you end up with a line in the opposite direction

Answer 8

I did it again and got 2x – y = –1

i don't think that is right either @Shane_B

Answer 9

The point-slope form the correct equation to produce that line would be:\[y=-2x+1\]Which equation in the answers is equivalent to that?

Answer 10

Oops..not point-slope....slope-intercept I mean.

Answer 11

Is it 2x – y = 1?

Answer 12

Wait i mean 2x + y = 1?

@Shane_B

Answer 13

SO CLOSE :P

Answer 14

Yes, that's it :)

Answer 15

Thanksssssss

Answer 16

Graph y=-2x+1 on your calculator to verify it...that's what I always do just to avoid silly mistakes.

Answer 17

you're welcome