Question

how do i set up problems like to determine if a line is parrallel, or perpendicular
line 1: y=x-3
line 2: y=1-x

Answer 1

find the slope of both lines. If the lines have the same slope and different y-intercepts, they are parallel. If the lines' slopes are negative reciprocals, they are perpendicular.

Answer 2

as @Peter14 has said

Answer 3

fine slope is the y2-x2/y1-x1?

Answer 4

with the line in the form y=mx+b, the slope is m

Answer 5

so for line 1 woud it be up 3 over 1? if i was ploting them on a graph?

Answer 6

for line 1, y=(invisible 1)x-3
the invisible 1 is the slope
the 3 is the y-intercept, which is b

Answer 7

if i do it that way the line is intersects so it would be perpendicular?

Answer 8

not all lines that intersect are perpendicular.