Question

Find the equation of a line that passes
through (-4,-1) (2,3).....how do i figure this out?

Answer 1

first find the slope of the two given coordinates

Answer 2

how do i find the slope?

Answer 3

rise / run

Answer 4

Slope can be found using the formula

\[m = \frac{ y _{1}-y _{2} }{ x _{1}-x _{2} }\]
and the eqaution of the line cam be found using the same formula I showed you earlier.

Answer 5

thank you! my final exam is tomorrow and i dont know how im gonna remember all these things!

Answer 6

Took me until my first year university to remember these. No clue why.

Answer 7

so it tells me to place the slope (1/3) and one ordered pair into point slope form

Answer 8

how do i figure out how to do that. I get the y=1/3x partbut i dont get how to use an ordered pair to put it in point slope

Answer 9

i think i got it actually. the y-y1 thing right?

Answer 10

Yes use that one.

Answer 11

i got y=1/3x+7/3 but i dont think that is right because its not coming up in my graphing calculator when i try andcheck it

Answer 12

Your slope should come out to 2/3.
\[m = \frac{ y _{1}-y _{2} }{ x _{1}-x _{2} } = \frac{ -1-3 }{ -4-2 }= \frac{ -4 }{ -6 }=\frac{ 2 }{ 3 }\]

Answer 13

oh. oops. i did it backwards 3-1 over 2--4...2/-6

Answer 14

oops 6

Answer 15

thank you

Answer 16

You're welcome.