Question

(9,15),(-12,3) write the two euqation of a line given two points

Answer 1

equation*

Answer 2

y=mx+b

Answer 3

First Find the Slope

\[m= \frac{ (y2-y1) }{ (x2-x1) }\]

the use Two point form:

\[y-y1 = \frac{ (y2-y1) }{ (x2-x1) } ( x-x1)\]

Answer 4

yes i noe how to fin the slope but not the equation its confusing

Answer 5

can you help me ?

Answer 6

the slope is already -12/-21

Answer 7

keep going and reduce that

Answer 8

can u doo it for me so i could understand ?

Answer 9

m = (y2-y1)/(x2-x1)


m = (3-15)/(-12-9)


m = (-12)/(-21)


m = 4/7

Answer 10

what?

Answer 11

I'm finding the slope

Answer 12

(-12)/(-21) reduces to 4/7

Answer 13

so the slope is 4/7

Answer 14

yes i noe but i already noe how to find the slope i need help making the equation y=mx+b

Answer 15

y = mx+b

y = 4/7x + b ... Plug in m = 4/7

15 = (4/7)*(9) + b ... Plug in x = 9 and y = 15

Answer 16

now solve for b