Vivian L. answered • 11/24/13

Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACH

Hi Rivera;

*Point-slope*form is...

y-y

_{1}=m(x-x_{1})You probably already know that m=slope.

I am assuming that x+y=1 is the line at issue. It is in

*standard*form.*Standard*form isAx+By=C, A and B do not equal zero and A is greater than zero.

Let's convert x+y=1 into

*slope-intercept*form of...y=mx+b, m is slope and b is y-intercept, the value of y when x=0.

y=-x+1

The slope is -1.

The slope of the line parallel to this is also -1.

POINT-SLOPE FORMULA...

y-3=-1(x-2)

y-3=-x+2

Let's add 3 to both sides so that we may combine like terms of 2 and 3...

3+y-3=-x+2+3

y=-x+5

The slope perpendicular to -1 is 1. It is the negative inverse. The inverse of 1/1 is 1/1. However, for example, if the slope is -2, the slope of the line perpendicular to this would be 1/2.