Question

how do you find the y-intercept? From point (3,-4) (2,0) I found the slope which is 4/-1. I have to put it in slope intercept form. how do I figure out the y-intercept?

Answer 1

y=mx+b
substitute in a point and the slope, then solve for b
to find y-intercept

Answer 2

?

Answer 3

"plug in a slope and point"?

Answer 4

I have y=4/-1x + ____

Answer 5

how do you do that?

Answer 6

use one of the points that were given
either (3,-4) or (2,0)

Answer 7

graph one of those points and do the slope?
do you always do tht to find the y-intercept

Answer 8

is it 8?

Answer 9

y=mx+b

subsitute in the slope

y=-4x+b

substitute in a point (3,-4)

-4=-4(3)+b

solve for b

b is the y intercept

Answer 10

and yes it is equal to 8

Answer 11

oh ok ...thanks a lot!

Answer 12

slope is -4, select any of the 2 points say (2,0) write the equation in point slope form
y- 0 = -4(x -2) simplify
y = -4x + 8 slope- intercept form
y- intercept is 8