Question

What is the y coordinate of the y−intercept of the line that passes through the points
(−4, −1) and (4, 5)?

Numerical Answers Expected!
need helppp please...

Answer 1

first find the slope
do u know how?

Answer 2

yes and then

Answer 3

do it! tell me what u get

Answer 4

ok

Answer 5

i get 6/8

Answer 6

yes reducing u get 3/4 right?

Answer 7

oh yeah

Answer 8

now u have one point of the line (4,5) or (-4,-1) whichever (but not both)
and u have m=3/4 the slope
the line has the following equation
\[ \large y-y_0=m(x-x_0) \]
where (x0,y0) is one of the points u have
plug in and tell me what u get

Answer 9

y-5 = 3/4(x-4) im not sure what i have to do :/

Answer 10

great this is the equation of the line
now the y-intercept is what u get when u have x=0

Answer 11

so
\[ \large y-5=\frac{3}{4}(0-4) \]
\[ \large y=5+\frac{3}{4}(-4)= \]

Answer 12

u finish it

Answer 13

do u understand what i did?

Answer 14

so the answer is 5

Answer 15

no

Answer 16

simplify the 4's
what is left?

Answer 17

0

Answer 18

no 2

Answer 19

no
\[ \large \frac{-4}{4}=-1 \]
right=

Answer 20

yes y=2

Answer 21

heres is another way
\[ \large y-5=\frac{3}{4}(x-4) \]
\[ \large y-5=\frac{3}{4}x-3 \]
\[ \large y=\frac{3}{4}x-3+5 \]
\[ \large y=\frac{3}{4}x+2 \]
this equation has the form
\[ \large y=mx+b \]
where m is the slope as before and b is the y-intercept

Answer 22

ok thanks again.

Answer 23

u r welcome