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What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slopeintercept form. (2 points)
 one year ago
 one year ago
What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slopeintercept form. (2 points)
 one year ago
 one year ago

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surdawiBest ResponseYou've already chosen the best response.2
y = mx + b m=(y2y1)/(x2x1)
 one year ago

Swageraid32Best ResponseYou've already chosen the best response.0
(1,4), m = 4 y = mx + b Sub to find b 4 = 4*1 + b b = 0  y = 4x m = 4 means slope = 4. slopeintercept form of equation of a straight line is y = mx + b. m is the slope. b is the yintercept. your equation starts of with the slopeintercept generic form of y = mx + b replace m with 4 to get y = 4x + b your line goes through the point (x,y) = (1,4) that means the xcoordinate is 1 and the y coordinate is 4. to find the yintercept, you replace y with 4 and x with 1 in the equation and solve for b. your equation of y = 4x + b becomes: 4 = (4 * 1) + b
 one year ago

lollyBest ResponseYou've already chosen the best response.0
can you set up the equation? then ill solve:P
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
@swiftskier96 is that the answer http://www.algebra.com/algebra/homework/Graphs/Graphs.faq.question.233716.html hahaha
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
(x1,y1) = (–1, –4) (x2,y2) = (1, 4)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
soo y=mx=b? isnt that for finding slope?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
yes but you need to find m 1st \[y=\frac{ y2y1 }{ x2x1 }\]
 one year ago

lollyBest ResponseYou've already chosen the best response.0
ook ill try it..hold on..:)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
m= 14/14. m=3/3 m=6
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
(x1,y1) = (–1, –4) (x2,y2) = (1, 4) x1 = 1 y1 = 4 x2 = 1 y2 = 4
 one year ago

lollyBest ResponseYou've already chosen the best response.0
right..thats what i did..,.i think..?
 one year ago

03225186213Best ResponseYou've already chosen the best response.0
(yy1)/(y2y1)=(xx1)/(x2x1)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
@surdawi how did i do it rong?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
(4  4)/(1 1)= 8/2=4
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
what you did (x2y2)/(x1y1)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
well i thought it was 6..but its not..?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
m = 4 now you choose wither point and solve for b y = 4x + b
 one year ago

lollyBest ResponseYou've already chosen the best response.0
k hold on ill try again..:)
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
\[m=\frac{ y2y1 }{ x2x1 }=\frac{ 4 4 }{ 1 1 }=\frac{ 8 }{ 2 }=\]
 one year ago

03225186213Best ResponseYou've already chosen the best response.0
for slope slope=(y2y1)/(x2x1) it can be directly solve see the formula that i have given already
 one year ago

03225186213Best ResponseYou've already chosen the best response.0
(yy1)/(y2y1)=(xx1)/(x2x1)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
oooh!!! i got the x1and 2s switched up..ok i see..:)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
the one with less numbers right?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
there is no zeros for x or y this time so pick one and solve, it doesnt matter which one
 one year ago

lollyBest ResponseYou've already chosen the best response.0
which one would be easier?
 one year ago

lollyBest ResponseYou've already chosen the best response.0
k ill do the one with less numbers..:P
 one year ago

lollyBest ResponseYou've already chosen the best response.0
so 4=4x1=b? 4=b..but we already knew that..
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
both of them has same amount of numbers :p 4=4x1=b? ! why is there an equal to b
 one year ago

lollyBest ResponseYou've already chosen the best response.0
4=8? that dosent make sense...
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
4=4x1+ b what is x1 = ?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
it should be one of the pairs either (1,4) or (1,4) 4 = 4*(1) + b
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
4 = 4 + b how can you keep b on one side?
 one year ago

lollyBest ResponseYou've already chosen the best response.0
4=4+b (then the 4 crosses out) +4 +4
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
4 +4 = 4 + 4 +b 0 = b y = 4x + 0
 one year ago

lollyBest ResponseYou've already chosen the best response.0
where did the other set of 4=4 come from?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
you have to add 4 to both sides
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
passes through points (–1, –4) and (1, 4)?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
Anamaria what grade you in?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
you should know how to add :P
 one year ago

lollyBest ResponseYou've already chosen the best response.0
lol i do know how to add:)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
4=4+b (then the 4 crosses out) +4 +4 was this rong?
 one year ago

lollyBest ResponseYou've already chosen the best response.0
lol @surdawi u sleeping?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
i went to pray dw:1351801108941:dw
 one year ago

lollyBest ResponseYou've already chosen the best response.0
lol were u praying that id understand how to do this? lol jk ook umm anyway i thought b=4?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
lol muslims pray 5 times a day not only sundays :P ok plug in b = 4 to check y = 4*x + 4 (1, 4) 4 = 4*1 + 4 4 = 8? is that right
 one year ago

lollyBest ResponseYou've already chosen the best response.0
4 is not 8...? im so confused!!
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
thats would be the answer if b was 4 correct answer is y = 4x + 0 = 4x plug in and check and where is my medal at??
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
do you want me to give you problem to do?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
try solving this What is an equation for the line that passes through points (2,5) and (6,7)? Write the equation in slopeintercept form. (you pay $10 hehe)
 one year ago

lollyBest ResponseYou've already chosen the best response.0
noo i dont want another problem im too stuck with this one..:)
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
tell what you dont understand dw:1351802673845:dw
 one year ago

lollyBest ResponseYou've already chosen the best response.0
i dont really understand what you did..like at all... for the one on the right side...
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
ok (1,4) now we need to substitute that into y =mx + b y = 4 x = 1 m = 4 y = m* x + b 4 = 4*(1) + b 4 = 4 + b we now need to add a 4 to both sides 4 = 4 + b +4 +4  0 = 0 + b ===> b = 0
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
no only 0 how do you get the 4?
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
we never got b = 4 we got m is 4
 one year ago

surdawiBest ResponseYou've already chosen the best response.2
i have to go to my Advance Engineering Math :( right now; which doesnt look like anything on here...try to figure it out; if you still have problems feel free to message me the answer is y = 4x
 one year ago
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