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Mathematics 68 Online
OpenStudy (anonymous):

need help finding the eqution of my answer

OpenStudy (farmdawgnation):

chirs97, stop reposting this and post your actual question please!

OpenStudy (anonymous):

what is the slope intercept of (2,2)and (-1,5) what the answer

OpenStudy (farmdawgnation):

So have you seen the slope equation? Because that's what you need. :)

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

i just need help to get the answer for my equation that i can up with y=x

OpenStudy (anonymous):

that was my answer

OpenStudy (anonymous):

y=x

OpenStudy (anonymous):

help me

OpenStudy (farmdawgnation):

No, you're looking for an actual number for this problem. Ok, so the first place to begin is to figure out the actual slope. The equation for slope- intercept is: \[y=mx+b\] We're looking for the B piece. So, we need to find m (the slope) first. Then we can use the slope-intercept form to find be.

OpenStudy (farmdawgnation):

Have you done any work with finding slopes of lines before?

OpenStudy (anonymous):

i know that i just need to see if is right

OpenStudy (anonymous):

i got y=x

myininaya (myininaya):

no y=x is not right

OpenStudy (anonymous):

that was my answer

OpenStudy (anonymous):

why is my answer not right did i do something wrong

myininaya (myininaya):

look at your slope

OpenStudy (anonymous):

ok

myininaya (myininaya):

recalculate that

myininaya (myininaya):

you shouldn't get 1 but you should get the opposite of 1 for your slope

OpenStudy (anonymous):

didnt know that

myininaya (myininaya):

\[m=\frac{5-2}{-1-2}=\frac{3}{-3}=-1\]

OpenStudy (anonymous):

i got 1 only

OpenStudy (anonymous):

how did u get -1

myininaya (myininaya):

-1-2=-3

myininaya (myininaya):

3/(-3)=-1

OpenStudy (anonymous):

i did that

myininaya (myininaya):

\[y-y_1=m(x-x_1)\] \[y-y_1=-1(x-x_1)\]

myininaya (myininaya):

now enter in a point and add y1 on both sides

OpenStudy (anonymous):

now i made something wrong

OpenStudy (anonymous):

so it is y= -1x

myininaya (myininaya):

\[(x=2,y=2)\]

myininaya (myininaya):

enter in this point

myininaya (myininaya):

\[y-2=-1(x-2)\]

myininaya (myininaya):

\[y-2=-x+2\] now add 2 on both sides

OpenStudy (anonymous):

did that

myininaya (myininaya):

y=-x+2+2 y=-x+4

OpenStudy (anonymous):

that the answer

myininaya (myininaya):

that is slope intercept form

myininaya (myininaya):

where -1 is the slope and (0,4) is the y intercept

OpenStudy (anonymous):

so it is y= -1x

myininaya (myininaya):

no y=-x+4 is what i have

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