Question

Find an equation for the line whose graph is sketched.

Answer 1

What is that x-intercept? Also, what program was used to graph that function?

Answer 2

We can see that the line clearly goes through 2 points:

(-1,5) and (0,1).. Now if only there were a way to find the equation of a line given two points on the line...

Ah well, perhaps science will one day have the answers to questions like this.

Also they might be, one day, able to come up with a name for this strange figure:
\[\bigcirc\]

Answer 3

?

Answer 4

http://dictionary.reference.com/browse/sarcasm

Answer 5

Polpak I believe that figure is known as a pie.... :P

Answer 6

obviously. so why can you not help with the problem

Answer 7

I can. Do you know how to find the equation of a line given two points?

Answer 8

no

Answer 9

Do you know the formula for the slope of a line passing through two points?

Answer 10

yes and with that i got -4/1

Answer 11

y=mx+b

Answer 12

gost you slope is right gj!

Answer 13

now what point did you start at to find your rise/run

Answer 14

or what point did you end with
doesn't matter give me either one

Answer 15

its (-1,5)(0,1)

Answer 16

Once you have your slope, you can use it along with one of your points in the point slope formula:

\[y-k = m(x-h)\]

Where m is the slope you found, and (h,k) is one of the points on the line.

Answer 17

ok cool so use one of those points and plug into what polpak has

or
you can use y=mx+b

you have (x=0,y=1) and m=-4/1=-4

so you can find the y-intercept (b)

Answer 18

so its written as 1=-4x+___?

Answer 19

x=0
so what does ___ equal

Answer 20

what is -4*0?

Answer 21

1 = -4(0) + b
b = ?

Answer 22

1

Answer 23

?

Answer 24

right!

b=1 gj

so we have y=-4x+1

Answer 25

thanks guys

Answer 26

that's the equation for the line. Nicely done. Now if only we knew what this thing is \(\bigcirc\), we'd have solved the two most pressing questions in modern science..

Answer 27

lol

Answer 28

A pie again!

Answer 29

no its pizza not pie

Answer 30

Sorry... I'm not very good with basic shapes... I'm only a primary school teacher :P

Answer 31

lol
its pizza pie!