Question

y=-1 what does this mean?

Answer 1

You are probably working in a paradigm of x values and f(x) = y values, where f(x) is a function of x. y= -1 means that the function at that point = -1 or it implies the line y = -1 for all values of x.

Answer 2

can you break it down for me please i'm new to this

Answer 3

I don't have a lot of context to help you with. Are you talking about lines or linear equations?

Answer 4

y=-1

Answer 5

look at the pdf file
I'm looking at number 4 reflect over y=-1

Answer 6

Ahhh. Yes. in this figure y = -1 is the horizontal line one unit below the x axis. (It is all the points in the plane which solve x= anything; y = -1).

Answer 7

i know that is the line vertical or horizontal?

Answer 8

how do I figure it out ?

Answer 9

Lines of the form y = a are Horizontal. Lines of the form x = a are Vertical.

Answer 10

y=-1 is the same as saying y = 0*x - 1. So a line with slope zero.

Answer 11

if it starts with y= it is horizontal right?

Answer 12

Kind of. y=2x-3 is not horizontal, but I think I know what you meant.

Answer 13

okay thank you can I ask question directly to you next time?

Answer 14

one way to know what y= -1 means:

it is the equation of a line. It means pick an x (for example x=0) at x=0 y= -1
so (0,-1) is on the line. pick another x, say x=1, y=-1 so (1,-1) is on the line.
plot the 2 points and you get a horizontal line.

if you had x= -1, and did the same thing: no matter what y is, x is -1, you would get points that go up and down. (vertical line)

and y=x you would get a line that goes up at an angle (if you pick x=1, and y=x, then y=1, so (1,1) is on the line. as is (0,0) and (2,2), and so on

Answer 15

Ohh.. Thank You