Question

Y=-1 & 3x +y=5 solve the system

Answer 1

Plug in -1 and that will give you x

Answer 2

So how would I graph this? @luigi0210

Answer 3

Graph both of them?

Answer 4

Yes, my book says to solve the system @luigi0210

Answer 5

So solving by graphing, okay.
So the first one is y=-1, which is just a horizontal line across the y-axis.
The second, x+y=5, needs to be changed into slope intercept form, can you change it?

Answer 6

I changed it to y=-3x+5

Answer 7

Graph both and the answer is where the two equations intersect.
As a corollary to this, parallel equations have no answers and equations that are the same have infinitely many answers

Answer 8

Good, so now that we have the equation in slope-intercept form we can graph them.
So graph y=-1 for me first