Question

find th Slope of the line that iS (a) parallel and (b) perpendicula to the FF line ..

1) from (4,-5) to (2,-1)
2)from (-3,7) to (1,1)
3)from (-6,5) to (3,-1)
4)from (3/4,-2/3)to (1/5/8, -/5/6)
5)from (-3/2/7, 4/3/5) to (-2/4/7, 6/7/10)

Answer 1

help

Answer 2

two lines are parallel if they have the same slope. so for the first part, you just need to calculate the slope between each pair of points.
two lines that are perpendicular have the property that the product of their slopes = -1. use this to calculate the second part.

Answer 3

So may i know your anSwer?

Answer 4

why do't you list your answers and I will let you if they are correct?

Answer 5

** don't

Answer 6

i cant Solve it :((

Answer 7

ok - try to do one thing at a time. lets start with the 1st one:
a line from (4,-5) to (2,-1). what is the slope of this line?

Answer 8

-2

Answer 9

correct, so the slope of a line that will be parallel to the line between these two points must also be -2

Answer 10

ok

Answer 11

next we know that if you multiply the slopes of two lines that are perpendicular to one another, then it equals -1.
so lets call the slope of the perpendicular line p.
p*(-2) = -1

so p=?

Answer 12

1/2

Answer 13

correct again - you are on a role!
now follow the same process for all the rest.

Answer 14

ahh got it tnx again ..

Answer 15

yw