Back
to top
Can't understand how this works?
Watch this threadPage 1 of 1
Go to first unread
Skip to page:
IfYouCanDreamIt
Badges:
15
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Attachment 553346553348Attachment 553346553348553340![Name: image.jpg
Views: 80
Size: 508.1 KB]()
I was working out fhe normal to a curve from my further maths revision guide, and I was fine until I got to the answer.
The revsion guide gave the answer as y+5=-1/4(x+2) or y=-1/4x-11/2
I got the y+5=-1/4(x+2) but can't understand how it could become y=-1/4x-11/2? Am I just being really dumb?
I'll attach a picture of the question in the revision guide, the answer in the revision guide, and my working out in case that can help any. Thanks!
(It's question 1, and sorry the working out is messy
)
The revsion guide gave the answer as y+5=-1/4(x+2) or y=-1/4x-11/2
I got the y+5=-1/4(x+2) but can't understand how it could become y=-1/4x-11/2? Am I just being really dumb?
I'll attach a picture of the question in the revision guide, the answer in the revision guide, and my working out in case that can help any. Thanks!
(It's question 1, and sorry the working out is messy
)
0
reply
khaleesi98
Badges:
7
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report
#2
The first one just rearranges to give the second? You've done the difficult bit lol x
1
reply
Synmatic
Badges:
3
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report
#3
if you expand the right hand side you get y+5=-1/4x-1/2 then if you want y on its own you have to take away five, to make it easier to understand I will take away 10/2 which is 5. so y=-1/4x-10/2-1/2 which is y=-1/4x-11/2
2
reply
IfYouCanDreamIt
Badges:
15
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
(Original post by khaleesi98)
The first one just rearranges to give the second? You've done the difficult bit lol x
The first one just rearranges to give the second? You've done the difficult bit lol x
(Original post by Synmatic)
if you expand the right hand side you get y+5=-1/4x-1/2 then if you want y on its own you have to take away five, to make it easier to understand I will take away 10/2 which is 5. so y=-1/4x-10/2-1/2 which is y=-1/4x-11/2
if you expand the right hand side you get y+5=-1/4x-1/2 then if you want y on its own you have to take away five, to make it easier to understand I will take away 10/2 which is 5. so y=-1/4x-10/2-1/2 which is y=-1/4x-11/2
2
reply
X
Page 1 of 1
Go to first unread
Skip to page:
Quick Reply
