Question

Find the x and y intercepts and graph the equation plotting the intercepts -7x-8y=56

Answer 1

this one?

Answer 2

this too lol but i was talking about my previous post problem

Answer 3

-7x-8y=56
Ok, x intercept is when y=0:
-7x-0 =56
x=56/(-7) = -8
(-8,0) =x intercept

then y intercept is when x=0
0-8y=56
y=56/(-8)
y=-7
(0,-7) =y intercept

plot those points and connect with a line

Answer 4

ok, send me the link of the one you want me to see. i didn't find it on the left side

Answer 5

Write the slope-intercept form of the equation of the line shown in the graph. Please show all of your work. please see attachment

Answer 6

Ah. I think I started that one, but someone else had been working on it.

Answer 7

Ok.

Answer 8

So, it looks like the y intercept is approximately -1, where it crosses the y axis, but because the graph gives the blue dots showing specific points, then the y intercept is not necessarily exactly -1.

Answer 9

So, take the two blue points.
(-6,-6)=(x1,y1)
and
(6,4)=(x2,y2)
\[slope=m=\frac{y1-y2}{x1-x2}=\frac{-6-4}{-6-6}=\frac{-10}{-12}=\frac{5}{6}\]

Answer 10

Then there is that equation in the format (y-a)=m(x-b) ...
i think.. Is that the right format?

Answer 11

http://en.wikipedia.org/wiki/Linear_equation#Two-point_form
ok!

Answer 12

So, seeing the equation in Wiki, they use a and b as the point#1

(y-(-6)) = (5/6)*(x-(-6))

y+6 = (5/6)*(x+6)

y+6 = (5/6)*x+5
subtract 6 both sides
y = (5/6)*x-1

Answer 13

Ok, so it turns out that the -1 does cross exactly at -1 on the y axis. The above method is for when you're not 100% sure.

If you were sure, you could use the format y=mx+b
put b=-1 and m=(5/6)
directly giving y = (5/6)x-1

Answer 14

you can also count the slope. like start at (0,-1), and count 5 squares up, 6 squares to the right, and you land on that blue dot.

Answer 15

Is this ok?

Answer 16

message me if you need more info :)

Answer 17

what did the other person tell you?

Answer 18

I'm not sure I solved your issue... what was your question? so you had some of it, but the graph didn't turn out properly?

Answer 19

okay i will the other person said the same

Answer 20

what was the confusing part?

Answer 21

all of it

Answer 22

Ah. I'm not sure how to do any better. O_O

Answer 23

its okay we working it out lol

Answer 24

phone call. just a bit