Question

What is the y-intercept of the line that has a slope of -1/2 and passes through the point (2, 3)?

Answer 1

r u familiar with the point slope formula? :) @ms1231988

Answer 2

the y-intercept is the point where the line crosses the y-axis

Answer 3

y=1/2x+ ______
I understand y=mx+b i just need help with the last numbers..

Answer 4

So find the a line that crosses through (2, 3) and add a slope of -½ and then look at where it crosses the y-axis

Answer 5

no the point slope is like this (x-x1) = m(x-x1)

Answer 6

-1/2

Answer 7

now im even more confused....

Answer 8

so fill in the known numbers:
y-(-3) = -1/2(x-(-2)

Answer 9

2-(-3) = -1/2(3-(-2) ...?

Answer 10

then you can just make it in slope intercept form!:
y+3=-1/2x-1
y = -1/2x -4

Answer 11

so the y intercept is -4

Answer 12

sorry this stuff is pretty complicated and i'm probably not doing a good job at explaining it :P

Answer 13

I just learned this on VLACS like yesterday, I understand it pretty well

Answer 14

thats the whole question... so i out -4 in the box?

Answer 15

yes
but you can try it out yourself by graphing the equation y=-1/2x -4 and see is it has the point 2,3

Answer 16

if you have any questions about how I came to this answer look at this:
https://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/point-slope-form/e/converting_between_point_slope_and_slope_intercept