Question

Determine if the lines that pass through the given points are parallel, perpendicular or neither. Line A: (-3, 5) and (0, 7) Line B: (6, 2) and (9, 4)

Answer 1

@jim_thompson5910

Answer 2

Do you know the slope formula?

Answer 3

not sure

Answer 4

hopefully you've seen this formula before

\[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]

Answer 5

or no?

Answer 6

oh yes!

Answer 7

@jim_thompson5910

Answer 8

@misty1212

Answer 9

so you will use that formula to find the slope of the line AB

Answer 10

do you know how to do that?

Answer 11

plug in the numbers x1 etc... but i dot have my calc

Answer 12

you can use online calculators, such as this one

http://web2.0calc.com/

Answer 13

ideally, you should be able to do this without a calculator (just use pen/pencil and paper)

Answer 14

wait which set do i use

Answer 15

Slope of AB
\[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}} = \frac{7-5}{0-(-3)} = ??\]

Answer 16

for AB, you use points A and B

you can make A be (x1,y1) and make B be (x2,y2)

Answer 17

2/3

Answer 18

yes, slope of AB is 2/3

Answer 19

oh wait, my bad, this is just the slope of line A

Answer 20

A is a line, not a point

Answer 21

slope of line A is 2/3

Answer 22

Line B: (6, 2) and (9, 4)

find the slope of line B

Answer 23

2/3?

Answer 24

also, 2/3, yes

Answer 25

whenever you have equal slopes, you have parallel lines

Answer 26

so what would the answer be

Answer 27

extra info: if the two slopes multiply to -1, then the lines are perpendicular.

Answer 28

it's practically given to you at this point

Answer 29

slope of line A is 2/3
slope of line B is 2/3

Answer 30

would it just be 2/3?

Answer 31

Original Problem: Determine if the lines that pass through the given points are parallel, perpendicular or neither.

Answer 32

parallel?

Answer 33

yes, we have 2 equal slopes (both equal to 2/3)

Answer 34

thank u sososos much